Database Develop

Questions about installing Magisk on Tablet

Hello, I need help installing and configuring Magisk on my tablet. Here is why and what I'm trying to do:
On my Samsung SM-T350, I originally installed TWRP and then installed a custom ROM which has root access (as far as I know, stock recovery is no longer on device). I recently installed a particular app and it indicates the program will not run all of the features because it has detected 'root' access. The suggestion online to work around this problem has been to install Magisk.
From this, I first went to the Magisk Manager website and download the 5.4.3apk and installed it. Then when I open the Magisk Manager app, it asks me if I want to 'Install Magisk-v14.0.zip now'. If I click 'install', a list of choices pop up (Download Zip Only, Patch Boot Image File, Direct Install). Which should I choose? I don't remember which of these I tried, but I recall it didn't work or didn't do anything.
So in the mean time, I downloaded the Magisk-v14.0.zip file locally to my tablet (Downloads folder). I 'think' the proper way to install is to boot into TWRP, then select 'Install', then navigate to the Magisk-v14.0.zip and then install image? Is that correct, or will this attempt to install over my custom ROM? What is the proper way to finish the installation?
Thanks in advance!

Does anyone have any suggestions?? Thanks

First - the "Magisk Manager website" is not a place you want to visit. It is not an official source for anything Magisk and should not be trusted. Only download from xda or @topjohnwu's GitHub.
Second - if you're already rooted you need to first unroot. Read more on installing Magisk in the release thread and the Installation and troubleshooting thread. Most, if not all your queries should be answered there.

MiX Pack for the simple user (TWRP AdAway SuperSU)

Hi all,
Here you may find a zip containing some very basic resources which can be found elsewhere without too much effort however I figured I would make things that slightest bit easier for some who use any of the MIUI 9+ builds.
The following zip file includes the latest custom SuperSU for MIUI Oreo, the latest release of TWRP, the latest release of AdAway.apk and for the hell of it, the stock MIX boot animation if you wish to use it on any other ROM. 20/5/18
https://www.dropbox.com/s/29u1z721blc1mdy/MIX Package.zip?dl=0
You can find guides elsewhere which go much more in-depth but I'll make a quick one for those who have unlocked bootloaders and are wanting to use any of the builds located on the official MIUI site: http://en.miui.com/download-334.html
The following are the steps I take for my usual installation;
1. Download chosen Official Developer or Stable ROM from the site above in FASTBOOT version. (Click "flashing guide", then "fastboot update" on the left menu where you will find all Xiaomi models, select either "latest global stable" or "latest global developer")
2. Extract ROM folder from download (example: chiron_global_images_8.4.19_20180419.0000.00_8.0_global) to C drive root.
3. Make sure fastboot drivers are installed and device can be seen by PC then download: https://xiaomiflashtool.com/
4. Connect your phone, load up the tool and click "select" on the top left. Here you will locate the ROM folder on C drive.
5. Click "refresh", if your phone is discovered then click "CLEAN ALL" at the bottom to prevent re-locking your bootloader followed by "flash" on the top right hand side which will initiate a full wipe of your phone followed by the installation of your ROM.
When complete allow phone to boot completely and then power it off. Continue below for root instructions.
6. Extract contents of MIX Package to your desktop and open CMD: Hold shift and right click your desktop, click "open powershell window here". Once powershell is loaded, type "cmd" and hit enter. When ready for step 7, boot your phone to fastboot mode.
7. You can either install TWRP or single-boot to it which will allow you to use it one time before reverting to stock recovery upon next reboot. For install, type "fastboot flash recovery recovery.img" and hit enter, then type "fastboot boot recovery.img" to boot to recovery. For single-boot TWRP type "fastboot boot recovery.img" which will boot into the img and allow any desired flashing without installing TWRP to your phone.
8. You are now in TWRP and should have storage access to your phone via your PC, copy SuperSU (and AdAway if desired) to your phone storage.
9. Hit "Install" in TWRP and select SuperSU zip file then flash. Once complete you may now boot your phone and progress through the first time setup.
10. Congratulations, you now have a completely fresh, clean rooted version of your desired MIUI. If you wish to enable full-system ad blocking, proceed to your file manager and install the AdAway.apk then follow instructions in-app.
As mentioned, this is not particularly a replacement for any other guide already published for the Mi Mix 2, it is the guide which I follow for all of my installations which gives me the cleanest possible MIUI. If you are using a stable release ROM and need to pass safety net then I suggest you use substitute SuperSU for Magisk however all the developer ROMs are unable to pass safety net anyway and I much prefer using SuperSU as it has never failed me and has the ability to hide the icon completely from launcher.
Kaji.

Link doesnt work

masterismos said:
Link doesnt work
Click to expand...
Click to collapse
Will upload dropbox version.
Edit: Done.

Nice guide. Quite simple enough. Thank you for this

namasteji1 said:
Nice guide. Quite simple enough. Thank you for this
Click to expand...
Click to collapse
Thanks man, first ever guide...I thought I'd give it a go.
New stable release V9.5.8.0 available now everyone! Download here today: http://en.miui.com/download-334.html
Changelog:
System
· Fix - Errors occurred when the device connected to a saved Wi-Fi hotspot (05-10)
· Fix - Device rebooted automatically in some cases (05-10)
· Fix - Caller ID errors (05-10)
· Fix - Notification settings weren't applied for dual apps (05-10)
· Fix - Search bar in the Notification shade didn't respond (05-10)
· Fix - The problem of abnormal charging needs to be restarted once it is upgraded to the corresponding version. (05-11)
Mi Drop
· Fix - Couldn't open Mi Drop in some cases (05-10)

My google play account has been block from ever purchasng in apps and games by google

Whatever I do google just wont let me purchase anything.
When I try direct carrier billing it tells me that my account is risky.
When I try to use my credit card it tells me the card's been declined.
How do I know my account or phone has been blocked by google play?
It's because I went as far as using my laptop and creating a google account on it and then registering my credit card on the google play account via chrome and it worked!
I linked the new account that's has been linked to my credit card to my phones playstore and it still wouldn't allow me to buy in app purchases.
Is there anyway to reset my phone so google can let me make in apps again? Would a factory reset work?

I
blitzball said:
Whatever I do google just wont let me purchase anything.
When I try direct carrier billing it tells me that my account is risky.
When I try to use my credit card it tells me the card's been declined.
How do I know my account or phone has been blocked by google play?
It's because I went as far as using my laptop and creating a google account on it and then registering my credit card on the google play account via chrome and it worked!
I linked the new account that's has been linked to my credit card to my phones playstore and it still wouldn't allow me to buy in app purchases.
Is there anyway to reset my phone so google can let me make in apps again? Would a factory reset work?
Click to expand...
Click to collapse
Is this really a phone issue or issue with your Google account - have you eg tried from another Android phone with the same Google acc?
If you think it is phone issue, you didn't specify firmware you are running
- if stock, its full build name (to see also are you on MM, N or O)
- or some custom ROM
Is it rooted and how
- old, no more updated/supported SuperSU
- or Magisk
If Magisk, which version and does SafetyNet passes (all green)?
Btw, in Playstore, does it pass Play Protect, and in its Settings (last item) is Device Certified?

zgfg said:
I
Is this really a phone issue or issue with your Google account - have you eg tried from another Android phone with the same Google acc?
If you think it is phone issue, you didn't specify firmware you are running
- if stock, its full build name (to see also are you on MM, N or O)
- or some custom ROM
Is it rooted and how
- old, no more updated/supported SuperSU
- or Magisk
If Magisk, which version and does SafetyNet passes (all green)?
Btw, in Playstore, does it pass Play Protect, and in its Settings (last item) is Device Certified?
Click to expand...
Click to collapse
Both the phone and the account tbh. I tried said account on my laptop and it ran into the same error my phone had ran into - which is the inability to link any sort of credit card to it.
Even tried removing all my accounts, wiping playstore and all of the other google related apps of their data, and then making a fresh new account. It worked for maybe ten or fifteen minutes which was weird and then the account started having the error the previous accounts did.
Emui 5.0.1
Android 7.0
Build is an L19B393
It's rooted
Supersu
Yep it passes play protect and it's certified.

blitzball said:
Both the phone and the account tbh. I tried said account on my laptop and it ran into the same error my phone had ran into - which is the inability to link any sort of credit card to it.
Even tried removing all my accounts, wiping playstore and all of the other google related apps of their data, and then making a fresh new account. It worked for maybe ten or fifteen minutes which was weird and then the account started having the error the previous accounts did.
Emui 5.0.1
Android 7.0
Build is an L19B393
It's rooted
Supersu
Yep it passes play protect and it's certified.
Click to expand...
Click to collapse
Even if Play Protect passing, it automatically sends info about your (rooted) configuration to Google, so better disable it.
What about SafetyNet?
There are dedicated and more detailed checkers but you can also find it in some Root checkers like
https://play.google.com/store/apps/details?id=org.freeandroidtools.root_checker
With SuperSU you might need SuHide to pass SafetyNet, but that's why Magisk is better, it knows how to hide root and to pass SafetyNet

zgfg said:
Even if Play Protect passing, it automatically sends info about your (rooted) configuration to Google, so better disable it.
What about SafetyNet?
There are dedicated and more detailed checkers but you can also find it in some Root checkers like
https://play.google.com/store/apps/details?id=org.freeandroidtools.root_checker
With SuperSU you might need SuHide to pass SafetyNet, but that's why Magisk is better, it knows how to hide root and to pass SafetyNet
Click to expand...
Click to collapse
Yeah my phone fails at the SafetyNet check. Is there a guide on how to go from Supersu to Magisk?

blitzball said:
Yeah my phone fails at the SafetyNet check. Is there a guide on how to go from Supersu to Magisk?
Click to expand...
Click to collapse
You can Google but installation of Magisk for Huawei is specific (at least for Oreo, maybe also for Nougat).
First you need to get rid of SuperSU:
- Use its Uninstall/Remove root option and then reboot
- It should clean the Boot and System partitions from SuperSU changes
- If you made root changes in Data partition, you will need Factory Reset from Recovery
It will be safer that you also flash the clean7stock Boot partition:
- Download FullOTA update.zip from Firmware Finder, corresponding to your current firmware
- Unzip, open update.app in Huawei Update Extractor (PC app) and extract Boot.img
- Flash Boot.img in Fastboot or TWRP
(Ideally, you should reinstall stock firmware if you have had issues when installing SuperSU and left some mess in System from that time)
Second, about the installation of Magisk you can read this post (more info about Magisk in that thread):
https://forum.xda-developers.com/showpost.php?p=77560239&postcount=27389
In short, you need to:
- Install latest Magisk Manager v6.01 (find it eg from the XDA Magisk thread above) and open it
- It will ask to install Magisk v17.1, decline and then check-in Preserve Force Encryption option
- Then click to install Magisk but instead of Direct Install take the option to patch Boot partition
- Navigate to the stock boot.img file (instructions above how to get it)
- Patched Boot will be saved to Downloads on Internal mem
- Flash that patched Boot, reboot, open Magisk Manager and let it complete the Magisk v17.1 installation
- Reboot, open Magisk Manager and trigger SafetyNet checking, allow it to install the needful

zgfg said:
You can Google but installation of Magisk for Huawei is specific (at least for Oreo, maybe also for Nougat).
First you need to get rid of SuperSU:
- Use its Uninstall/Remove root option and then reboot
- It should clean the Boot and System partitions from SuperSU changes
- If you made root changes in Data partition, you will need Factory Reset from Recovery
It will be safer that you also flash the clean7stock Boot partition:
- Download FullOTA update.zip from Firmware Finder, corresponding to your current firmware
- Unzip, open update.app in Huawei Update Extractor (PC app) and extract Boot.img
- Flash Boot.img in Fastboot or TWRP
(Ideally, you should reinstall stock firmware if you have had issues when installing SuperSU and left some mess in System from that time)
Second, about the installation of Magisk you can read this post (more info about Magisk in that thread):
https://forum.xda-developers.com/showpost.php?p=77560239&postcount=27389
In short, you need to:
- Install latest Magisk Manager v6.01 (find it eg from the XDA Magisk thread above) and open it
- It will ask to install Magisk v17.1, decline and then check-in Preserve Force Encryption option
- Then click to install Magisk but instead of Direct Install take the option to patch Boot partition
- Navigate to the stock boot.img file (instructions above how to get it)
- Patched Boot will be saved to Downloads on Internal mem
- Flash that patched Boot, reboot, open Magisk Manager and let it complete the Magisk v17.1 installation
- Reboot, open Magisk Manager and trigger SafetyNet checking, allow it to install the needful
Click to expand...
Click to collapse
I have a TWRP backup of the stock boot.img. Would that work? It's in a .win format though and there are two files not sure how to convert them into .img.
Here's the exact names of the files:
boot.emmc.win
boot.emmc.win.md5

blitzball said:
I have a TWRP backup of the stock boot.img. Would that work? It's in a .win format though and there are two files not sure how to convert them into .img.
Here's the exact names of the files:
boot.emmc.win
boot.emmc.win.md5
Click to expand...
Click to collapse
TWRP backup that can be restored through TWRP (Restore option in TWRP)

zgfg said:
TWRP backup that can be restored through TWRP (Restore option in TWRP)
Click to expand...
Click to collapse
Thanks man. I'll go ahead and install magisk

zgfg said:
TWRP backup that can be restored through TWRP (Restore option in TWRP)
Click to expand...
Click to collapse
Dude so I installed it with no problems but I still can't pass safety net

blitzball said:
Dude so I installed it with no problems but I still can't pass safety net
Click to expand...
Click to collapse
As I wrote above, restore-reinstall + Factory reset complete stock firmware to get rid of SuperSU
With clean stock SafetyNet passes.
If it doesn't pass, you don't have clean and don't wastw time installing Magisk - first you must have clean basis

zgfg said:
As I wrote above, restore-reinstall + Factory reset complete stock firmware to get rid of SuperSU
With clean stock SafetyNet passes.
If it doesn't pass, you don't have clean and don't wastw time installing Magisk - first you must have clean basis
Click to expand...
Click to collapse
It's working now dude. I passed the safetynet! I still have one issue though... Even though I passed it, Netflix is still not available on my google playstore.

blitzball said:
It's working now dude. I passed the safetynet! I still have one issue though... Even though I passed it, Netflix is still not available on my google playstore.
Click to expand...
Click to collapse
Don't know, not using NetFlix. Make sure that PlayProtect and Device Certified pass in Playstore

zgfg said:
Don't know, not using NetFlix. Make sure that PlayProtect and Device Certified pass in Playstore
Click to expand...
Click to collapse
I have Netflix now. It's weird though cause only after maybe ten or twenty minutes did it show up in my store. Still can't buy anything though google still detects my phone for some reason. Thanks anyways.

[Guide]Installing Lineage

Installing Lineage​
Few quick things.
LOS 18.1 is now official so the guide will now just be covering that.
I also want to address a common question, you can use Windows for this process. I prefer Linux, and Fastboot just works in Linux without driver issues. If you have Fastboot and ADB working in Windows already feel free to use that if you want.
Frequently asked Questions:
This looks like a lot of work, is there an easier way to install? Try the LOS Wiki Method.
Using TWRP 3.5.2_9-0​1. Start off Fresh. Install OOS using the Fastboot ROM.
Start off with a fresh install of OOS. You need the latest version of OOS 10. I typically use a the fastboot ROMs for this as it will do both slots for me at once. (Alternatively you can use TWRP and install the ZIPs and do it twice to get it on both slots, or my least favorite, the MSM Tool if you want. Doesn't matter how OOS ends up on both slots, as long as it ends up on both slots.)
I use Linux, and honestly I feel like it's easier and more reliable for fastboot and ADB so that's what I'm including here in these steps. It's easy to boot from a USB.
To create a bootable Linux flash drive you can use Unetbootin, which you can download for free here (Your other option would be to burn the ISO straight to a DVD and skip the unetbootin step):
https://unetbootin.github.io/
For Linux, I'm using Linux Mint Cinnamon, You can download for free here:
https://www.linuxmint.com/download.php
Then run unetbootin (yours will look a little different, I'm running it in Linux):
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Point it to the Linux ISO, and tell it where an empty flash drive is. It will erase everything on the flash drive. Afterwards you can load whatever you want on the flash drive. However be aware when booting Linux from this drive you can't access what is on the drive (at least not by normal methods).
After this has successfully completed, reboot the PC, and boot from the USB drive. Your PC will boot into Linux (turning off the PC and removing the USB drive will make it boot up like normal again).
Next we need to install fastboot and adb. You need to open up the "start menu" and open the "synaptic package manager". You can find this stuff in the menus, however the easiest way to get to these items is to just start typing the name of the item. See below:
Search fastboot, click the boxes, choose install. Then search for ADB, click the boxes, choose install and then click apply. It's that easy it will download everything that's needed and install.
Time to open up a terminal:
Just to make sure we don't run into any problems we need to update adb and fastboot. In the terminal run these commands to update fastboot and adb (this is downloading them directly from Google).
wget https://dl.google.com/android/repository/platform-tools-latest-linux.zip
unzip \platform-tools-latest-linux.zip
sudo cp platform-tools/adb /usr/bin/adb
sudo cp platform-tools/fastboot /usr/bin/fastboot
You will also need the appropriate fastboot ROM. Fastboot ROMs available in this thread. The catch being that thread is no longer updated. So we will need to make our own fastboot rom. To do this we need two things:
1. The stock rom zip (OP Site).
2. Payload dumper. I've yet to get the one from the GitHub link to work, so I've been using the one from this Article. Direct Download Link
You need to extract the payload.bin file from the stock rom zip. Extract the payload_dumper files as well, and place everything in the same folder. Payload_dumper requires python3. Open up Synaptic again, search for python3.6 and install it. Now open a terminal so we can extract the images from the payload.bin.
Navigate to the location of payload_dumper and your payload.bin file. In my case my commands are:
cd Desktop <-- switches to the Desktop folder
cd payload_dumper <-- switches to the payload_dumper folder on the Desktop
python3 payload_dumper.py payload.bin <-- runs the payload_dumper "program" and extract the images from the payload.bin
Now would be a good time to back everything up. The phone will get wiped. Extract the fastboot images to a folder that is easy to find. I would recommend the Desktop.
Now it's time to flash all those images we just extracted using payload dumper. Place the phone in fastboot mode. You can do this using the advanced reboot menu, ADB, or the key combinations (all key combos listed below for reference):
Volume Up + Power while turning on will boot to fastboot.
Volume Down + Power while turn on will boot to recovery.
Holding Volume Up + Power should force the phone to turn off.
Volume Up + Volume Down should put your phone in Download mode for the MSM Tool.
You can flash the images one by one or use a script. My script is available here. Flashing the fastboot ROM should look something like this:
That image explained:
cd Desktop <-- Switched the directory to the Desktop the default directory when you open up the terminal is the /home directory.
cd flash <-- I put my fastboot images in a folder called flash. This stuff is case sensitive. My folder was all lowercase.
sudo fastboot devices <-- Is just checking to see if my PC can see my phone, and making sure it's in fastboot. Sudo is necessary for this distro, as both fastboot and ADB must be run as root.
sudo sh FlashThese.sh <-- Tells the terminal to run my script, since the script contains fastboot commands it must be run as root.
At the end you should get something like this:
Then just choose start form Fastboot (If you were previously on a custom ROM go straight to recovery and wipe everything). Not booting and getting dumped off at the OnePlus recovery screen is nothing to worry about. Choose your language of choice, Wipe data and cache, Erase everything (Music, pics, etc), This can not be undone, continue. After that the phone will boot. Once booted enable developer options, advanced reboot, and reboot to fastboot.
2. Installing TWRP.
First step is to boot the correct TWRP image. Grab the current TWRP from the official site. You need both files, the img file, and the installer. Once again from the terminal:
The image explained:
cd Desktop <-- Switched the directory to the Desktop the default directory when you open up the terminal is the /home directory.
sudo fastboot devices <-- Is just checking to see if my PC can see my phone, and making sure it's in fastboot. Sudo is necessary for this distro, as both fastboot and ADB must be run as root.
sudo fastboot boot twrp-3.5.2_9-0-fajita.img * <-- Sends that TWRP image to the phone to be booted temporarily. Only boot this, never run the command "flash".
Once in TWRP the phone should show up as a media device so you can copy files to it. Copy the TWRP installer over to it. Choose Install from the TWRP menu and navigate to where you placed the TWRP installer. Press on it, and swipe to confirm flash. When it is done hit the back button until you are back out to the main menu.
From the main menu choose reboot, and choose Recovery:
The first time you try and reboot the official version of TWRP it will ask you if you want to install the TWRP app. Do NOT install the app. In the settings you can disable this prompt. Your other option is just uncheck both boxes at the screen you see below when you get to it, and then click the button that says do not install. Do use the slider. At that point the phone will reboot as to recovery as you selected.
Now that you are back in TWRP that is now installed, time to wipe the phone. From the main menu choose Wipe. Swipe the factory reset slider at the bottom. Then hit back. Next hit Format Data. Type Yes to Continue. Hit back to continue. Keep hitting back till you get to the main menu.
Do NOT wipe cache, do not Wipe system, do NOT Wipe Dalvik / ART, do not add anything else, Just Factory Reset and Format Data. After doing those two Reboot to Recovery one more time. So go back into the reboot menu, choose reboot to recovery again (swipe to allow modifications if it asks). You must do this after formatting data.
3. Install Lineage
Links:
Lineage 18.1 XDA Thread
Official 6T Lineage Downloads
The phone should still be in TWRP at this point. You now need to copy Lineage to the phone. From TWRP's main menu choose install. Then navigate to your ROM .zip location and click on it. Then swipe to confirm flash.
Lineage will replace TWRP, so you need to reflash TWRP as well. Run the TWRP installer again. If it's not on the phone, just copy it over again real quick. On A/B devices ROMs get flashed to the opposite slot. Things like Gapps, Magisk, etc get flashed to the current slot. We need Lineage on both slots, so it must be flash again. Flashing it twice only needs to be done the first time as we need to get rid of OOS. For updates it just gets flashed once. After the TWRP installer has run, back out to the main menu, and choose reboot, then recovery:
Once back in TWRP flash Lineage again. From TWRP's main menu choose install. Then navigate to your ROM .zip location and click on it. Then swipe to confirm flash.
Now run the TWRP installer again. Back out to the main menu, and reboot to recovery.
4.Optional, Gapps
Links:
NikGapps <-- For Lineage 18.1 (Use the R Folders for Android 11. I recommend the "Core" version. I also tested Basic though if you want that level of Gapps. I strongly recommend you grab setup wizard out of the R Addons Folder, I used the regular setup wizard, not the pixel one.)
MindTheGapps <-- It's worth mentioning here Lineage recommends MindTheGapps for 18.1. Take your pick. I personally use NikGapps as I can use a "leaner" Gapps package.
Now that your phone is back in TWRP for the last time before booting up Lineage, it's time to install Gapps if you want them. This step is optional. Same as the other steps here, go to install, choose your OpenGapps package, Then navigate to your .zip location and click on it. Then swipe to confirm flash.
5. Very Optional, Magisk
These steps are very optional. However this is how I, root, pass safety net, and get a various apps to appear in the Play store.
Flash Magisk in TWRP. For Magisk 23, you now have to rename the Magisk.apk to Magisk.zip. Then flash it in TWRP. If you wanted to uninstall it, you rename it to uninstall.zip. If you already had an older version of Magisk installed, make sure you do not have it hidden / nenamed when installing Magisk 23 for the first time. Restore the original package before installing 23.
Magisk <-- Flash this right after Gapps.
These items are add-ons are flashed in Magisk after the first boot (Don't flash these in TWRP anymore):
MagiskHide Props Config
Busybox
To flash modules in Magisk press the puzzle piece icon. Then choose install from storage. Now just choose your addons. After flashing the icons it will have a reboot icon at the bottom. You can reboot or you can press back and flash another. After you are done reboot.
You will also need a Terminal Emulator. I personally use:
Terminal Emulator for Android
Once all these are installed the first step is setup Magisk. Under Magisk go to settings:
In version 20.4+ Magisk Hide is no longer on by default. So make sure the Magisk Hide, Hide Magisk from various forms of detection switch is flipped. Then press Hide Magisk Manager. This will bring up a box for you to choose a random name for the Magisk Manager, type whatever you want here. You can leave it Manager if you wish, but I typically change this.
Now open Magisk again. It will ask you to download it again, click ok, then manually open the app again as it says. Now we need to open Magisk hide. This is now under the shield icon, then click the arrow at the top:
These are the apps you don't want to know that you have root. Less is better. You can cause instability problems by just choosing everything. My general rule of thumb is, Google, steaming video, music, and payment apps get selected. In my experience if I come across an app that needs it and I didn't select it, I just clear cache and/or data and re-open the app and it works. There are some big multiplayer apps that ban hardware / people, so do your research (don't ask me, I don't play those games).
Next time to change the device fingerprint using MagiskHide Props Config Module. We do this using the terminal emulator. In the terminal emulator, type "su" to gain root privileges. Then type props to run the module:
Now it's just following the menus. Choose option 1 - Edit device finger print. (type 1, hit enter)
After this you will see a menu of devices. It doesn't matter what device you pick really. If you want apps / Google to think you have a OPPO or Samsung pick one of those Fingerprints. However there's a bit more to passing Safety-net than that. Since Google has changed how things work not all those fingerprints that used to work will work now. Also now you may get an error when you turn on the phone because of the security dates. The OP6T Android 10 fingerprint has no issues at this point, so use that if you want:
After choosing the fingerprint you want, it will ask you if you want to reboot. Choose yes. After rebooting, you may need to clear the cache from the play store for some apps to appear in it. You should now pass safety net. Check this in Magisk:
6. Very Optional, Ad Blocking with a Host File.
You can block many things with a hosts file, most popular would be ads. I've been use StevenBlack's host file which is a compilation of several hosts files. This is located on Github:
https://github.com/StevenBlack/hosts (Scroll down you'll see the options of what you can block)
Direct link to the hosts file I use. This will block Adware / Malware.
Unfortunately for quite some time now on this device you can no longer just use a root browser to swap the hosts file. The easiest way is to use TWRP.
First we have to make the hosts file. The hosts file must use unix / linux line endings. If you are using linux, don't worry about this, just create the file. If you are using Windows, the easiest thing to do is use Notepad++ (Free).
Notepad++ Downloads
Next one other caveat. The hosts file is quite large. I've never had much luck copy and pasting it from any other browser than Firefox (Windows or Linux), but however you get it into Notepad++ is not a big deal.
Once in you have the hosts file into Notepad++ go to Edit, EOL Conversion, and Choose Unix (LF).
Now save the file as "hosts" no ending. This does mean under file type you will need to change it to All File types *.*. Move this hosts file to your phone. Then reboot to recovery. From the main TWRP menu, choose mount. Then mount system:
Hit the back button and go to the advanced menu. Choose File Manager:
You will find your hosts file under /sdcard, wherever you placed it. In my case I placed it in a folder called ROMs. Once you locate it, press and hold it for a moment, and relase. Then choose copy file:
At this point you need to tell TWRP where you want to paste the hosts file. It belongs in the /etc folder. The only hic-cup here is depending on what you were doing in TWRP this could be (on this device) /system/etc or /system/system/etc (you will see similar folders to the image below if you are in the right place). Once you are there, press "paste?" button in the lower right corner:
After this just swipe to confirm:
You can now reboot the device, and your hosts file should now be in place. Your ad block should now be active for all apps as it's global for all connections.
7. Reboot to system.
Updating Lineage​
1. Flash Lineage.
Reboot to recovery. You can use the advanced reboot menu, or Volume Down + Power while turning the phone on. Don't wipe anything. From TWRP's main menu choose install. Then navigate to your ROM .zip location and click on it. Then swipe to confirm flash.
Lineage will replace TWRP, so you need to reflash TWRP as well. Run the TWRP installer again. After the TWRP installer has run, back out to the main menu, and choose reboot, then recovery:
2. Optional, Gapps (if you installed them once you must continue to install them or do a clean install)
Links:
NikGapps
Now that your phone is back in TWRP for the last time before booting up Lineage, it's time to install Gapps if you want them. This step is optional. Same as the other steps here, go to install, choose your OpenGapps package, Then navigate to your .zip location and click on it. Then swipe to confirm flash.
3. Reboot to system.
Last updated​Since I don't want people to have to wonder if these instructions are current, I am going to periodically test and update this post with my results. Please note I'm testing with a 6T, TMobile 6Ts are different. You can generally assume previous versions of LOS and OOS were also tested, but if you are unsure feel free to ask in this thread.
Last tested with:
OOS 10.3.7 and LOS 17.1 12-31 with TWRP 3.4.0-2
OOS 10.3.11 and LOS 18.1 05-27 with TWRP 3.5.2_9-0
This method has also been tested with:
OOS 10.3.3 and Omnirom 5-24 MicroG and Omnirom 5-24.

Cliff Notes
*TWRP 3.5.0_9-0+ Must be used with LOS 18 / 18.1
- Backup everything to the PC, so you will need to copy all your data over.
- Sync all your accounts, etc.
- In TWRP format data. Reboot recovery (This step wipes the device, make sure you backed everything up!)
- Factory Reset. (This is the slider at the bottom, do not Wipe system, do NOT Wipe Dalvik / ART, do not add anything else)
- Flash Lineage
- Flash TWRP Installer
- Reboot to Recovery
- Flash Lineage (This is only the first time, to get the AOSP rom on both slots, only do this for the first install)
- Flash TWRP Installer (This is only the first time, to get the AOSP rom on both slots, only do this for the first install)
- Reboot to Recovery (This is only the first time, to get the AOSP rom on both slots, only do this for the first install)
- Flash Gapps (Optional)
- Flash Magisk (Optional) (Remember for ver 22 the Magisk.apk gets renamed to Magisk.zip, can also be renamed to uninstall.zip for uninstalling)
- Reboot to System.
- Then you should be able to setup the device, copy everything back over. Restore your data.
After this you should be able to update Lineage as normal.
- Reboot to recovery
- Flash Lineage.
- Flash TWRP Installer
- Reboot to Recovery
- Flash Gapps. (Optional, but if you flashed them once you have to keep flashing them.)
- Flash Magisk. (Optional)
- Reboot to system.
- No loss of data, or anything.

Thanks for the guide, able to flash los 17.1 successfully.

How to go back to OOS?
Does anyone have a guide on how to go back to OOS after flashing Lineage according to Lineage's instructions?

fordjonathan said:
Does anyone have a guide on how to go back to OOS after flashing Lineage according to Lineage's instructions?
Click to expand...
Click to collapse
Back up your data, use Step 1 of these instructions. That will put OOS back on your phone.
MSM Tool, always my least favorite option, but always an option.
MSM Tools for Regular 6T (TMobile uses a different one)

installed 17.1!
OhioYJ said:
Installing Lineage...​
Click to expand...
Click to collapse
Massive thanks for your instructions!
- at first, I tried upgrading from LOS 16.0 to LOS 17.1. I followed the instructions on the wiki, but it landed me in the qualcomm crashdump mode.
- after that I ran into your instructions, and tried to follow your update guide, but it didn't help (not very surprising I guess, but I haven't had much to lose at this point ).
- after that, I just followed your fresh install guide (i.e. flashing the fastboot room and starting from scratch), followed every step and it worked!
I wonder if it's worth updating lineage OS wiki and pointing to your instructions? There is bunch of people in this thread, who also bricked the phone into crashdump, so perhaps it could help to prevent it for someone else.

Updating to LOS 17.1 ?
Dasseem said:
Thanks for the guide, able to flash los 17.1 successfully.
Click to expand...
Click to collapse
Initially I had problems with updating LOS, so I returned to Stock. As more people attempted to install LOS, and this fine Original Poster "Ohio" offered such excellent, and detailed instructions, I have been running LOS 16 since February.
However, I have not updated it, since I have had Zero Issues.
But to clarify, you used this method to update to LOS 17.1 ?
- coming from LOS 16 - without first returning to a fast-boot ROM ?
Did you up-date GApps accordingly during this Flash ?
Thank You, in advance, for any assistance!
:good:

barguybrady said:
But to clarify, you used this method to update to LOS 17.1 ?
- coming from LOS 16 - without first returning to a fast-boot ROM ?
Click to expand...
Click to collapse
Hi, I updated my previous reply to make it a bit more clear!
Yep, I was on LOS 16. Haven't had any issues, but figured why not update if I'll have to do it eventually
So I downloaded 17.1 and used the wiki instructions, which messed the phone up
Ended up flashing fastboot rom and starting from scratch, flashed gapps and magisk according to OhioYJ's instruction and it worked.

Flashing method
barguybrady said:
But to clarify, you used this method to update to LOS 17.1 ?
- coming from LOS 16 - without first returning to a fast-boot ROM ?
Did you up-date GApps accordingly during this Flash ?
Thank You, in advance, for any assistance!
:good:
Click to expand...
Click to collapse
I was using carbon ROM previously, had to move to OOS latest for flashing the lineage 17.1, believe it needs to be done if you are coming from pie, people know better correct me if I am wrong here.
As Karlicoss mentioned, it's better to follow the method posted by Ohio.

OhioYJ said:
Cliff Notes Versions
Installing Lineage
- Install fastboot ROM boot it once. Just to make sure everything is good.
- Reboot to fastboot.
- Boot the image of TWRP.
- Run the TWRP installer, reboot to recovery
- You backed everything up right?
- Factory reset (This is the slider at the bottom in the wipe menu).
- Format data. (This is the button that says Format data in the wipe menu)
- Do NOT wipe cache, do not Wipe system, do NOT Wipe Dalvik / ART, do not add anything else, Just Factory Reset and Format Data. After doing those two Reboot to Recovery one more time. You must do this after formatting data.
- Now transfer Lineage and TWRP to your phone, Windows / Linux should see TWRP fine as a media device when plugged in.
- Install Lineage
- Run the TWRP Installer.
- Reboot to Recovery.
- Install Lineage (You need Lineage on both slots, so yes run it again)
- Run the TWRP Installer (yes again).
- Reboot to Recovery.
- Install Gapps if you want them.
- Install Magisk if you use Magisk. Do not install modules or other add ons at this point. Boot once and go through the setup and everything, then install your add-ons.
- Be aware the phone may restart once, then Lineage will start up and all will be good.
Updating Lineage
- Reboot to recovery
- Flash Lineage.
- Flash TWRP Installer
- Reboot to Recovery
- Flash Gapps. (Assuming you use them, if you installed them once you must continue to install them or do a clean install)
- Flash Magisk. (Optional If you use it)
- Reboot to system.
- No loss of data, or anything.
- No need to flash anything twice etc.
Click to expand...
Click to collapse
Updating failed for me, as it shows everything encripted once I reboot the second time to recovery on slot B...

badpanda said:
Updating failed for me, as it shows everything encripted once I reboot the second time to recovery on slot B...
Click to expand...
Click to collapse
Usually this means you didnt format data, or you are using an old version of TWRP. Did you do a clean install?
I just tried it on my phone, was running 4-12 build, using 3.3.1-32 TWRP, updated to the 4-14 build, using 4-14 Gapps (nano), everything went smoothly here.

OhioYJ said:
Usually this means you didnt format data, or you are using an old version of TWRP. Did you do a clean install?
I just tried it on my phone, was running 4-12 build, using 3.3.1-32 TWRP, updated to the 4-14 build, using 4-14 Gapps (nano), everything went smoothly here.
Click to expand...
Click to collapse
No, no clean install. Just wanted to update to today's newest build os.

bump...

Thanks a lot for your guide. Very helpfull.
I'm using it with /e/ rom.

installing android 10 roms
I followed exactly as it was written. Same issues arose for me. After the phone is off then turned on no LTE. It makes phone calls and also text stuff. HOWEVER when you take out and reinsert sim LTE is enable. What is the problom?????????

sickpoppy said:
I followed exactly as it was written. Same issues arose for me. After the phone is off then turned on no LTE. It makes phone calls and also text stuff. HOWEVER when you take out and reinsert sim LTE is enable. What is the problom?????????
Click to expand...
Click to collapse
Just cycling airplane mode doesnt work? This isn't a TMobile 6T is it? You are in Sim slot 1? You maybe better asking in the LOS thread, and provide log it not working and then it working when you reinsert it. Im not quite sure whats going on there.

OhioYJ said:
Usually this means you didnt format data, or you are using an old version of TWRP. Did you do a clean install?
I just tried it on my phone, was running 4-12 build, using 3.3.1-32 TWRP, updated to the 4-14 build, using 4-14 Gapps (nano), everything went smoothly here.
Click to expand...
Click to collapse
So this means you do have to always format data for every single update??
---------- Post added at 09:07 PM ---------- Previous post was at 09:05 PM ----------
sickpoppy said:
I followed exactly as it was written. Same issues arose for me. After the phone is off then turned on no LTE. It makes phone calls and also text stuff. HOWEVER when you take out and reinsert sim LTE is enable. What is the problom?????????
Click to expand...
Click to collapse
Change your sim card to the other slot...
---------- Post added at 09:11 PM ---------- Previous post was at 09:07 PM ----------
@OhioYJ So for an update you boot to recovery flash LOS latest version then flash twrp again and then reboot to recovery second time then format data to possibly decript encrypted system and, transfer files both gapps and magisk to device and then install gapps and magisk, lastly just reboot to system?

reply
yes it is a tmobile but it was flashed to global. TWRP is the version you are using. downloaded the lastest ROM. Weird it finds LTE at first then like I said when then phone shuts off LTE doesnt work til I take sim out.

badpanda said:
So this means you do have to always format data for every single update??
Click to expand...
Click to collapse
No that would be ridiculous. Not necessary at all. You have something else going on, but I dont know what. My update procedure is exactly as listed on the OP, on two 6Ts, two different carriers.

sickpoppy said:
yes it is a tmobile but it was flashed to global. TWRP is the version you are using. downloaded the lastest ROM. Weird it finds LTE at first then like I said when then phone shuts off LTE doesnt work til I take sim out.
Click to expand...
Click to collapse
A TMobile "converted" to global does not equal a global 6T. Logs posted in the LOS thread, may help out other TMobile users? The TMobile 6Ts introduce all sorts of quirks, and Im afraid I dont have any experience with them, so hopefully another TMobile user will be able to help.

[GUIDE][SM-T290/SM-T290N] Samsung Galaxy Tab A 8.0 (2019) - How to Install LineageOS 18.1 (GSI) + Gapps

Hello!
So recently I was able to install LineageOS 18.1 (GSI) + GApps on my Samsung Galaxy Tab A 8 (SM-T290) tablet and wanted to share how I did it. I noticed a lack of decent step-by-step guides to modding this tablet so I figure I'd share what I learned through scouring multiple threads and through multiple headaches. Fun fact: I also got this working with LineageOS 19 (GSI), however it ran pretty poorly and Android 12 is ugly as hell so why bother anyway? ALSO interestingly enough, you'll see I wrote [SM-T290N] in the title as well. That is the model of the Kid's Edition of this phone, which happens to be the one I had. So I can confirm this process works for the Kid's Edition of this tablet as well as the original.
Some Things To Note
Below I'll list the software/firmware I used in this process. You don't necessarily need to follow this exactly but I don't see any reason not to. The end result is a working install of LineageOS with GApps so if that's what you want I would just follow along step-by-step. ALSO I'm writing this from memory so if I make a mistake please let me know and I'll try and correct it.
Click to expand...
Click to collapse
What You'll Need
Your tablet
A USB Cable to connect your tablet to your PC
A 4GB+ MicroSD card
A Windows PC
Some patience
Instructions
Preparing Your MicroSD Card
1. Place the LineageOS 18.1 .img file from this thread (On SourceForge, there is a section below the files about the naming conventions and how they relate to the hardware of your device and configuration of your ROM. I used the lineage-18.1-20220315-UNOFFICIAL-arm64_bvS-vndklite.img.xz image for my device. If your device is slightly different, you can use Treble Info to determine what ROM you should use. Just make sure to use the VNDKLITE rom if your device supports it.
2. Place the multidisabler .zip folder on there as well. This will preserve encryption provided by TWRP after rebooting.
3. Finally, place the MindTheGapps .zip folder on your SD card (make sure to get the correct version. In my case this was the 11.00-arm64 version).
4. Insert your MicroSD card into your device.
Unlocking the Bootloader
So the first thing you're gonna want to do is unlock your OEM bootloader on your Samsung device.
1. Go to Settings->About Phone->Software Information and look for a field called "Build Number". Tap this Five Times until you see a notification saying developer settings were enabled.
2. Go to Settings->Developer Settings and look for the setting labeled OEM Unlock and turn it on.
If you don't see this setting try connecting to wifi, changing your date and time to around two months prior (I set mine to back to May 2021 since the firmware I was using was set in July 2021), then go back to your developer settings and switch them off and back on again. You should now see the OEM Unlock option.
Click to expand...
Click to collapse
3. From here, you can reboot your device into Recovery Mode by holding the Vol+ and Vol- buttons when the device begins to boot again.
4. You should see a blue screen with some options. Press the Vol+ button to enter Download Mode. This is where you'll use Odin to flash the firmware you need as well as TWRP.
Flashing Firmware
So when I attempted this process I used Magendanz's Unofficial TWRP 3.6.0 as it is the only version of TWRP I found for this device. I also used Odin v3.14.1_3B Patched from this XDA thread. Magendanz's TWRP requires you to have the T290XXU3CUG4 Firmware (I used the XAR region) in order to flash TWRP to your device (you can check wether or not you already have this firmware on your phone by looking the About Phone section again). It takes a while to download though make sure you have some time.
1. Download Odin and run the program. Unzip your firmware folder and use the relevant files when selecting the BL, AP, CP, CSC fields in Odin. I didn't use the HOME_CSC just leave it blank.
2. Connect your device via USB and Flash this firmware to your device.
3. Once your device restarts, go through the setup process and then repeat the Unlocking the Bootloader instructions above in order to make sure it is unlocked again.
4. Reboot your device the same way as stated above.
Flashing TWRP
Before starting, be aware that after you flash TWRP to your device, your device will restart and attempt to open the stock system again. You're going to want to hold the Power and Vol+ buttons simultaneously. You will likely get a warning screen saying that the bootloader is unlocked and may ask you to do a factory reset, this (I believe) is fine. The key here is that once you press the Power Button to continue (as instructed on the warning screen) you'll want to immediately press and hold the Power and Vol+ keys for around 6 Seconds before letting go again (you should be seeing the Samsung Galaxy Tab A logo screen). After letting go, wait around 3-4 seconds, if nothing changes, restart the device by holding all three buttons (Power, Vol+,Vol-) and attempt the process again. It's a pain in the ass but you'll get it eventually. Just make sure not to let the device boot into the system again as that can cause problems in TWRP and you'll likely have to start the process over (from flashing the firmware).
1. Once your tablet is once again in Download Mode, open Odin again and flash the TWRP (tar.md5 file) to the AP (recovery) partition. Do not use any of the other partitions.
2. If this is successful, your phone will begin to reboot. Quickly press and hold the combination of buttons Power and Vol+ until you see the warning dialog pop up. Once you do, release all buttons and be ready to quickly press and release the Power button continue, and then immediately after press and hold the Power and Vol+ buttons again for 6 seconds. After around 6 seconds, release all buttons. Wait around 3-4 seconds and, if the screen does not change to the TWRP logo, restart the device by pressing and holding all buttons simultaneously and try this step again.
3. If you have entered into TWRP, congrats!
Installing Custom ROM + Software in TWRP
1. The first thing you'll want to do is select the Wipe->Format Data. Type 'yes' and hit enter (or swipe I forget which).
2. Next, select Install, and then select your MicroSD card as your storage device. You should see your zip files (if not switch from the install image option).
3. Install the multidisabler, do not reboot
4. Go back into Install and select Install Image (might not be the exact naming) option. Select your MicroSD card as the storage device again and install the LineageOS 18.1 rom. Do not reboot.
5. Go back into Install and select your MindTheGapps zip file and install it.
Now, a lot of people run into a problem when trying to install Gapps which is your device complaining about no more available space in the system partition. If this is the case, go back to Wipe and select Advanced Wipe. Select your system partition and then select Change or Repair Partition. Once you're here you should see the size and available space of your partition. You'll want to hit Resize Partition and let it do it's thing. To confirm it worked, go back to Wipe->Advanced Wipe->Select System->Change or Repair Partition and your available space should be much larger now. Now just attempt to install MindTheGapps again.
Click to expand...
Click to collapse
Final Steps
Once you reboot you should be able to successfully reach the setup screen for Lineage. Go through the steps of setting up your device as usual and be sure that Gapps are installed. Go ahead and re-enable developer settings and enable USB-Debugging and Root Debugging. The reason for this is that, when I first installed Gapps, Google Play Protect would keep throwing warnings at me about my device not being Google Play Certified. This means I couldn't actually use any of the google play services. If you run into the same issue, here are the steps you can take to fix it:
1. First, go into Settings->Apps and find your Google Play Services app. Clear the cache and delete the app data, then reboot your device. If you try and sign into the Google Play store and you are able to without getting any play protect warnings, then you're good you can disregard the following steps.
2. If you are still receiving these warnings, you'll want to head over to this site and follow the instructions (I'm not gonna tell you how to use ADB here). Once you submit your framework ID, reboot your device. Everything should be working fine now.
And that's it! If I am forgetting any steps please let me know, again I am writing this from memory of the process so it may be missing some minor details. I hope this helps!!!

How's the stability, speed and the responsiveness on Lineage with a t290? I have mine rooted debloated and twrp installed but it is slow on stock OS

kkdamion said:
How's the stability, speed and the responsiveness on Lineage with a t290? I have mine rooted debloated and twrp installed but it is slow on stock OS
Click to expand...
Click to collapse
It runs surprisingly well! Much better than stock. There’s virtually no input lag and the battery life is also very solid on lineage.
Where i run into some lag is when trying to use apps that have embedded video in them. For whatever reason the T290 cannot handle video very well at all.
So yeah I would definitely recommend trying it, it’ll really breathe new life into that tablet

i cant get google play services to work and i cant fetch device_id to register the device
i get "no closing qoute" message
adb shell 'sqlite3 /data/data/com.google.android.gsf/databases/gservices.db \
/system/bin/sh: no closing quote
EDIT: downloaded "android device id" APK from the internet and gathered the framework id information from the app

kkdamion said:
i cant get google play services to work and i cant fetch device_id to register the device
i get "no closing qoute" message
adb shell 'sqlite3 /data/data/com.google.android.gsf/databases/gservices.db \
/system/bin/sh: no closing quote
EDIT: downloaded "android device id" APK from the internet and gathered the framework id information from the app
Click to expand...
Click to collapse
Glad it worked out for you! Let me know if you have any more questions and I'd be happy to help.

Hi! is this applicable also for SM-T295?

for those trying to figure out the Google Play Certified page with the adb command
Code:
adb shell 'sqlite3 /data/data/com.google.android.gsf/databases/gservices.db \
"select * from main where name = \"android_id\";"'
do : adb shell
first then paste in :
sqlite3 /data/data/com.google.android.gsf/databases/gservices.db \
"select * from main where name = \"android_id\";"
and it shouldn't give you the error

i must say. linageos on my sm-t290 is really nice
its fast and smooth way much better then stock fw
i would reccomend anyone with a t290/t295 to install this GSI

Im into a bootloop right now after a few fails with installing Lineage on my SM-T290..
Seems like i cant install any rom? not sure how to fix this issue, can anyone point me in the right direction?
Im able to get into TWRP and download mode. but cant install any rom?

thepalek1ng said:
Hello!
So recently I was able to install LineageOS 18.1 (GSI) + GApps on my Samsung Galaxy Tab A 8 (SM-T290) tablet and wanted to share how I did it. I noticed a lack of decent step-by-step guides to modding this tablet so I figure I'd share what I learned through scouring multiple threads and through multiple headaches. Fun fact: I also got this working with LineageOS 19 (GSI), however it ran pretty poorly and Android 12 is ugly as hell so why bother anyway? ALSO interestingly enough, you'll see I wrote [SM-T290N] in the title as well. That is the model of the Kid's Edition of this phone, which happens to be the one I had. So I can confirm this process works for the Kid's Edition of this tablet as well as the original.
What You'll Need
Your tablet
A USB Cable to connect your tablet to your PC
A 4GB+ MicroSD card
A Windows PC
Some patience
Instructions
Preparing Your MicroSD Card
1. Place the LineageOS 18.1 .img file from this thread (On SourceForge, there is a section below the files about the naming conventions and how they relate to the hardware of your device and configuration of your ROM. I used the lineage-18.1-20220315-UNOFFICIAL-arm64_bvS-vndklite.img.xz image for my device. If your device is slightly different, you can use Treble Info to determine what ROM you should use. Just make sure to use the VNDKLITE rom if your device supports it.
2. Place the multidisabler .zip folder on there as well. This will preserve encryption provided by TWRP after rebooting.
3. Finally, place the MindTheGapps .zip folder on your SD card (make sure to get the correct version. In my case this was the 11.00-arm64 version).
4. Insert your MicroSD card into your device.
Unlocking the Bootloader
So the first thing you're gonna want to do is unlock your OEM bootloader on your Samsung device.
1. Go to Settings->About Phone->Software Information and look for a field called "Build Number". Tap this Five Times until you see a notification saying developer settings were enabled.
2. Go to Settings->Developer Settings and look for the setting labeled OEM Unlock and turn it on.
3. From here, you can reboot your device into Recovery Mode by holding the Vol+ and Vol- buttons when the device begins to boot again.
4. You should see a blue screen with some options. Press the Vol+ button to enter Download Mode. This is where you'll use Odin to flash the firmware you need as well as TWRP.
Flashing Firmware
So when I attempted this process I used Magendanz's Unofficial TWRP 3.6.0 as it is the only version of TWRP I found for this device. I also used Odin v3.14.1_3B Patched from this XDA thread. Magendanz's TWRP requires you to have the T290XXU3CUG4 Firmware (I used the XAR region) in order to flash TWRP to your device (you can check wether or not you already have this firmware on your phone by looking the About Phone section again). It takes a while to download though make sure you have some time.
1. Download Odin and run the program. Unzip your firmware folder and use the relevant files when selecting the BL, AP, CP, CSC fields in Odin. I didn't use the HOME_CSC just leave it blank.
2. Connect your device via USB and Flash this firmware to your device.
3. Once your device restarts, go through the setup process and then repeat the Unlocking the Bootloader instructions above in order to make sure it is unlocked again.
4. Reboot your device the same way as stated above.
Flashing TWRP
Before starting, be aware that after you flash TWRP to your device, your device will restart and attempt to open the stock system again. You're going to want to hold the Power and Vol+ buttons simultaneously. You will likely get a warning screen saying that the bootloader is unlocked and may ask you to do a factory reset, this (I believe) is fine. The key here is that once you press the Power Button to continue (as instructed on the warning screen) you'll want to immediately press and hold the Power and Vol+ keys for around 6 Seconds before letting go again (you should be seeing the Samsung Galaxy Tab A logo screen). After letting go, wait around 3-4 seconds, if nothing changes, restart the device by holding all three buttons (Power, Vol+,Vol-) and attempt the process again. It's a pain in the ass but you'll get it eventually. Just make sure not to let the device boot into the system again as that can cause problems in TWRP and you'll likely have to start the process over (from flashing the firmware).
1. Once your tablet is once again in Download Mode, open Odin again and flash the TWRP (tar.md5 file) to the AP (recovery) partition. Do not use any of the other partitions.
2. If this is successful, your phone will begin to reboot. Quickly press and hold the combination of buttons Power and Vol+ until you see the warning dialog pop up. Once you do, release all buttons and be ready to quickly press and release the Power button continue, and then immediately after press and hold the Power and Vol+ buttons again for 6 seconds. After around 6 seconds, release all buttons. Wait around 3-4 seconds and, if the screen does not change to the TWRP logo, restart the device by pressing and holding all buttons simultaneously and try this step again.
3. If you have entered into TWRP, congrats!
Installing Custom ROM + Software in TWRP
1. The first thing you'll want to do is select the Wipe->Format Data. Type 'yes' and hit enter (or swipe I forget which).
2. Next, select Install, and then select your MicroSD card as your storage device. You should see your zip files (if not switch from the install image option).
3. Install the multidisabler, do not reboot
4. Go back into Install and select Install Image (might not be the exact naming) option. Select your MicroSD card as the storage device again and install the LineageOS 18.1 rom. Do not reboot.
5. Go back into Install and select your MindTheGapps zip file and install it.
Final Steps
Once you reboot you should be able to successfully reach the setup screen for Lineage. Go through the steps of setting up your device as usual and be sure that Gapps are installed. Go ahead and re-enable developer settings and enable USB-Debugging and Root Debugging. The reason for this is that, when I first installed Gapps, Google Play Protect would keep throwing warnings at me about my device not being Google Play Certified. This means I couldn't actually use any of the google play services. If you run into the same issue, here are the steps you can take to fix it:
1. First, go into Settings->Apps and find your Google Play Services app. Clear the cache and delete the app data, then reboot your device. If you try and sign into the Google Play store and you are able to without getting any play protect warnings, then you're good you can disregard the following steps.
2. If you are still receiving these warnings, you'll want to head over to this site and follow the instructions (I'm not gonna tell you how to use ADB here). Once you submit your framework ID, reboot your device. Everything should be working fine now.
And that's it! If I am forgetting any steps please let me know, again I am writing this from memory of the process so it may be missing some minor details. I hope this helps!!!
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Click to collapse
bro, I have a problem, my tablet is in a bootloop and I don't know what to do, try with other custom roms but it's the same, what do I have to do so that when I install a custom room it doesn't give me that error?

Flashing the Gapps package resulted in an error: Failure to mount '/system_root' (Invalid argument)

V0latyle said:
Flashing the Gapps package resulted in an error: Failure to mount '/system_root' (Invalid argument)
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Click to collapse
Sorry for the bother, new to Android modding scene.
I went into the recovery menu (oem unlock on) and tried to flash TWRP as written on this guide, but I get a secure check fail : aboot on my device and fail on Odin. What do I do here?
Edit: Aparently my device is SM-T295, basically the LTE version of the same device, which is why it isn't recognising it. My bad.

Do you have any video to teach better ???

HyruleanKnight said:
Sorry for the bother, new to Android modding scene.
I went into the recovery menu (oem unlock on) and tried to flash TWRP as written on this guide, but I get a secure check fail : aboot on my device and fail on Odin. What do I do here?
Edit: Aparently my device is SM-T295, basically the LTE version of the same device, which is why it isn't recognising it. My bad.
Click to expand...
Click to collapse
Shouldn't matter, TWRP is the same for both variants.
There's two ways to get around the secure check fail problem:
After updating via Odin, make sure you immediately interrupt the boot and force reboot into Download Mode. Then, flash TWRP.
Or, after updating, allow your device to boot to Android, skip through the setup wizard (make sure you connect to the internet), and enable Developer Options. Ensure OEM Unlocking is there and grayed out. If not, leave it for a bit until it is. This disables Vaultkeeper on the bootloader. Then, reboot to download mode and flash TWRP.
In both cases, after flashing TWRP, DO NOT let the device boot into Android. Force boot into recovery, then install the Multidisabler from here.
Now to my own problem...
I don't know what I did differently (or wrong) but I cannot get LineageOS to boot correctly on my T290. I was running 18.1 before. I recently updated to CVG3 and followed the same process as I did before - flashed TWRP, then installed the LineageOS GSI to /system.
18.1 continuously bootloops without even loading LineageOS.
19.1 gets to the LineageOS splash screen, and occasionally the setup screen, but continuously reboots also.
After flashing TWRP, I'm installing the multidisabler, then wiping /system, /data, /cache.
Any idea what I'm doing wrong?
@J.Michael any thoughts? You're more familiar with Samsung than I am

V0latyle said:
Shouldn't matter, TWRP is the same for both variants.
There's two ways to get around the secure check fail problem:
After updating via Odin, make sure you immediately interrupt the boot and force reboot into Download Mode. Then, flash TWRP.
Or, after updating, allow your device to boot to Android, skip through the setup wizard (make sure you connect to the internet), and enable Developer Options. Ensure OEM Unlocking is there and grayed out. If not, leave it for a bit until it is. This disables Vaultkeeper on the bootloader. Then, reboot to download mode and flash TWRP.
In both cases, after flashing TWRP, DO NOT let the device boot into Android. Force boot into recovery, then install the Multidisabler from here.
Now to my own problem...
I don't know what I did differently (or wrong) but I cannot get LineageOS to boot correctly on my T290. I was running 18.1 before. I recently updated to CVG3 and followed the same process as I did before - flashed TWRP, then installed the LineageOS GSI to /system.
18.1 continuously bootloops without even loading LineageOS.
19.1 gets to the LineageOS splash screen, and occasionally the setup screen, but continuously reboots also.
After flashing TWRP, I'm installing the multidisabler, then wiping /system, /data, /cache.
Any idea what I'm doing wrong?
@J.Michael any thoughts? You're more familiar with Samsung than I am
Click to expand...
Click to collapse
I think I have a solution.
I see that you are installing the multidisabler after you booted TWRP and by wiping the partitions, however, what you are supposed to do is this:
After you have booted into TWRP and have swiped to allow modifications, go to Wipe> Format Data and type yes. Don't reboot, and don't wipe any other partitions.
After that, go to install and then install the multidisabler, don't reboot.
Then install the latest LineageOS gsi to the system partition, and finally install gapps, then reboot.
Make sure you are choosing the arm64_bvS_vndklite variant, otherwise it will bootloop.
Hope this helps!

Just Mike said:
I think I have a solution.
I see that you are installing the multidisabler after you booted TWRP and by wiping the partitions, however, what you are supposed to do is this:
After you have booted into TWRP and have swiped to allow modifications, go to Wipe> Format Data and type yes. Don't reboot, and don't wipe any other partitions.
After that, go to install and then install the multidisabler, don't reboot.
Then install the latest LineageOS gsi to the system partition, and finally install gapps, then reboot.
Make sure you are choosing the arm64_bvS_vndklite variant, otherwise it will bootloop.
Hope this helps!
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Click to collapse
Okay, so install Multidisabler AFTER wiping data. I'll try that.
I'm using the bgS image so it's already got Google apps. I didn't have any success flashing any of the Gapps packages on the vanilla images.
Is Multidisabler still necessary on Android 11 on this device, or do we just need a patched vbmeta.img?

V0latyle said:
Okay, so install Multidisabler AFTER wiping data. I'll try that.
I'm using the bgS image so it's already got Google apps. I didn't have any success flashing any of the Gapps packages on the vanilla images.
Is Multidisabler still necessary on Android 11 on this device, or do we just need a patched vbmeta.img?
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Click to collapse
Yes, Multidisabler is necessary, otherwise it'll bootloop. I haven't tried anything with a patched vbmeta and frankly don't want to.
The bgS version will work just fine for Android 11.
Currently running Android 13 with LineageOS 20.0, the bvS version. Gotta say it works great. MindtheGapps 13 will work, I haven't encountered any "This device is not certified" issues.

Just Mike said:
Yes, Multidisabler is necessary, otherwise it'll bootloop. I haven't tried anything with a patched vbmeta and frankly don't want to.
The bgS version will work just fine for Android 11.
Currently running Android 13 with LineageOS 20.0, the bvS version. Gotta say it works great. MindtheGapps 13 will work, I haven't encountered any "This device is not certified" issues.
Click to expand...
Click to collapse
Do I need to wipe /system or /boot or anything before installing? I did exactly as you said - rebooted to recovery (was running Samsung stock), formatted data, installed multidisabler, then installed a LineageOS 19 image to /system. It begins to boot (LineageOS animation) then reboots.
Are you using Andy Yan's builds?

V0latyle said:
Do I need to wipe /system or /boot or anything before installing? I did exactly as you said - rebooted to recovery (was running Samsung stock), formatted data, installed multidisabler, then installed a LineageOS 19 image to /system. It begins to boot (LineageOS animation) then reboots.
Are you using Andy Yan's builds?
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Click to collapse
Nope, you don't have to wipe any other partitions, only format data
Yes, I'm using Andy Yan's builds. I'll link the thread here: https://forum.xda-developers.com/t/gsi-13-lineageos-20-trebledroid-based.4517345/
If I may ask, which type GSI from Andy Yan did you use?

Just Mike said:
Nope, you don't have to wipe any other partitions, only format data
Yes, I'm using Andy Yan's builds. I'll link the thread here: https://forum.xda-developers.com/t/gsi-13-lineageos-20-trebledroid-based.4517345/
If I may ask, which type GSI from Andy Yan did you use?
Click to expand...
Click to collapse
Trying to get back into TWRP, just a sec...
-arm64_bgS.img
Flashing the vndklite one now to see if it works
If I can get this working, I plan on using a bgN flavor so I can just install Magisk, since I don't use SuperSU
Edit: vndklite is bootlooping too