Database Develop

OOS 5.0 With Root stuck on booting

I was on Oos 4.5.1 and wanted to update to Oreo. I followed the thread on this forum and downloaded the new TWRP BluSpark img file, the OOS full package and the Magisk zip. Booted into recovery, installed the img file and flashed OOS and the Magisk zip file. When i rebooted into system, i noticed Root wasn't installed and my recovery had reverted to stock recovery but my device bootloader was still unlocked. So i booted into fastboot mode, flashed the Blusparks img file and booted into recovery and flashed the magisk file. Now the phone rebooted and its stuck on the "Powered By Android" screen. The boot image of OP hasn't shown up. What do i do? I really don't want to hard reset my phone :/

No need to hard reset the phone, just go to recovery clean flash excluding internal storage then flash oxygen os 5.0 zip file and magisk 14.5.
Magisk 14.0 has boot issues.
I had similar issues which I resolved easily.
You may trigger DM verity flag after booting which you can disable easily.

ersandeepkr said:
No need to hard reset the phone, just go to recovery clean flash excluding internal storage then flash oxygen os 5.0 zip file and magisk 14.5.
Magisk 14.0 has boot issues.
I had similar issues which I resolved easily.
You may trigger DM verity flag after booting which you can disable easily.
Click to expand...
Click to collapse
Oh yes, i figured Magisk 14.0 was the issue. I waited for 30 mins+ and the phone still didnt boot up, so i switched it off and booted into recovery and flashed just the OOS zip file and it worked. I don't want to wipe data as well.
Can i flash Blusparks twrp from adb, boot into recovery and just flash OOS and Magisk 14.5 and wipe dalvik/cache?

Manjumeth-95 said:
Oh yes, i figured Magisk 14.0 was the issue. I waited for 30 mins+ and the phone still didnt boot up, so i switched it off and booted into recovery and flashed just the OOS zip file and it worked. I don't want to wipe data as well.
Can i flash Blusparks twrp from adb, boot into recovery and just flash OOS and Magisk 14.5 and wipe dalvik/cache?
Click to expand...
Click to collapse
You can flash bluspark recovery from fastboot. But for the successful installation and avoid problems, forget the application data. You can fresh install apps which is always recommended while flashing any ROM even if it is updated version. I never dirty flash ROM. I care for internal storage and not for the small apps.
You can try dirty flash as you stated but stability may be an issue.

Dirty flashed with Magisk 14.5 and it worked

absolute cluster**** after attempting to move from 4.5.0 to 5.0

So... was tired of some miscellaneous issues with 4.5.0 (rooted w/ Magisk, TWRP recovery) and decided to finally jump to 5.0. Failed initially in TWRP (was using stock 3.1.xx), moved to the OOS internal upgrade option, and actually managed to boot into 5.0 (albeit stock recovery and no root) after that succeeded.
Powered off, connected to PC, fastboot flashed TWRP 3.1.1 blu spark, rebooted into recovery, reflashed blue spark img, flashed OnePlus3TOxygen_28_OTA_060_all_1711160447.zip (went fine AFAIK, "script succeeded, 1.0000"). Cleared Dalvik/cache, flashed SuperSU v2.82... and this is where things got weird. First, flashing SuperSU failed once at the point of compressing the ramdisk. rebooted into TWRP, tried again, and it finished without error messages. Wiped Dalvik/cache once more and rebooted. This time, I got a permanent boot where my OP3T appeared to freeze at the first OP logo on a black background and would go no further even after 10+ minutes. Swapped out my SuperSU zip with a download straight from their website, same frozen boot. Redownloaded OTA_060_all, same thing. Wiped dalvik/cache/system before each attempt, no luck.
Gave up, fastboot -w, reflashed TWRP blu spark, and now even just drying to flash the plain OTA_060 zip results in a "no OS installed" when I try to reboot. When I try to flash either Magisk v15 or SuperSU 2.82, TWRP freezes entirely in the first steps, crashes to a white notification icon, and requires a long power button hold to reboot. I am lost at this point. AFAIK, my OP3T is basically a blank, wiped slate, and I've never experienced full-on TWRP freezes while flashing before blu spark.
In the meantime, I've installed OTA_057 (4.5.1) instead, thankfully without a bootloop, but fully wiped any suggestions?

I've jumped from Nougat to Oreo too. These are my steps: while on nougat open the TWRP recovery (stock TWRP); MAKE A COMPLETE BACKUP; updated it to the latest version (3.2.1.0.- if you have it installed then there's no need for this step); complete wipe; install the OTA using USB OTG; boot to system; run the first setup; (now TWRP might got overwritten just reboot to recovery, if it reboots to TWRP great, move on, if not then reboot to system and install TWRP using ADB); reboot to TWRP recovery; flash Magisk 15 (or SuperSU, but I don't use it so I can't say if it works); flash kernel if you want; reboot to system; check if Magisk/SuperSU works and that's it. At this point I've made another complete backup just in case I skrew up something in the future. Hope I helped! Good luck!

Are you using supersu 2.82 SR5.
I had same problem with my 3T going from nougat to oreo.

Tagtag123 said:
Are you using supersu 2.82 SR5.
I had same problem with my 3T going from nougat to oreo.
Click to expand...
Click to collapse
Yep, I believe that's exactly the version I tried I eventually just gave up after doing the complete device wipe through fastboot commands, am now running 5.0 with no problems but have the stock recovery and am not rooted :/ Now I just need to make a backup and then I can mess around and try and find a root method that doesn't basically soft brick my phone...

Even I am running OOS 5.0
The way I rooted is:
Flashed oos 5.0 using TWRP (https://forum.xda-developers.com/devdb/project/dl/?id=27381&task=get)
Boot normally
Reboot to TWRP, flash TWRP using fastboot if you find stock recovery. Then boot to TWRP.
After you in the TWRP recovery, flash superSU 2.82 SR5
Then flash suhide (it helps you hide root from apps which are a bit finicky about root).
This works for me.
SuperSU v2.82-SR5 flashable ZIP:
http://download.chainfire.eu/1220/SuperSU/SR5-SuperSU-v2.82-SR5-20171001224502.zip
suhide v1.09 flashable ZIP:
http://download.chainfire.eu/1219/suhide/UPDATE-suhide-v1.09-20171001222116.zip

I just followed these steps coming from rooted 4.5.1 and worked perfectly.
https://forums.oneplus.net/threads/guide-how-to-install-oos-5-0-over-rooted-4-5-1.684519/
Unleashed by my rooted OP3T in 8.0

[SOLVED!] Can't install Magisk without bootloop

Scroll down over this post to see anwer!
Hey there! I just got my Xiaomi Mi8 from HK Goldway at Aliexpress. It came with its bootloader already unlocked and a Global ROM flashed.
I wanted to install Magisk but failed horribly . I've already done that to several phones (my last one was a Moto X Play, and it worked without major complications). But with this one, it seems I can't get past the bootlogo.
Stock Fastboot image used:
dipper_global_images_V9.5.13.0.OEAMIFA_20180714.0000.00_8.1_global
This is what I've tried so far:
First try
Flashed TWRP for Mi8 version 0711.
Flashed Magisk.
Got a bootloop.
Reflashed stock image via Fastboot.
Second try
Booted (not flashed) TWRP.
Tried to install latest global weekly from this thread.
Also got a bootloop.
Reflashed stock image via Fastboot.
Third try
I thought that those flashable ZIP firmwares were too small for them to be a full-fledged OS. So I went and downloaded this other one. Global version.
I read somewhere that I needed to format data before flashing a new image, so I did.
Booted TWRP.
Formated data (not Wipe)
Installed that ZIP from TWRP and booted correctly.
Booted TWRP again and flashed Magisk.
Got bootloop.
Back to stock image via fastboot.
Last try
Booted TWRP.
Formatted data.
Installed MIUI via TWRP.
Without rebooting, flashed Magisk and no-verity-opt-encrypt-6.0.zip.
This got past bootlogo ("Unlocked" message changed to "powered by Android") but got stuck there. Not booting at all.
Right now I'm back to the last try, booting MIUI successfully but without Magisk nor no-verity-opt-encrypt.
I kinda have no more ideas left. I understand this is a new device but I can't understand why people claim the have been able to install Magisk and I can't! Other thoughts were, maybe they were running MIUI 10 Beta and it only works with that version? I'm unsure about that.
Can someone lend me a hand? What am I missing?
Thank you!!
EDIT: FIX!
Over here, user @richardyusan helped me out with an extra step.
What I did:
Installed Magisk V16.7.
Installed DM-VERITY AND FORCED ENCRYPTION DISABLER.
Performed fastboot format userdata.
Rebooted.
And I got my phone booting with Magisk Installed!
Even though I couldn't install any module, (every install claimed I needed Magisk v15+). I read some threads and with a Magisk Direct re-install (from its app) I got Magisk downgraded to v16 and everything worked perfectly!
Hope this works out for everyone having this problem!

have you tried to use Magisk 16.4,
if not, try to follow this guide:
https://www.theandroidsoul.com/xiaomi-mi-8-root/

gulp79 said:
have you tried to use Magisk 16.4,
if not, try to follow this guide:
https://www.theandroidsoul.com/xiaomi-mi-8-root/
Click to expand...
Click to collapse
Thank you for the fast reply!
I followed that guide and tried these steps:
fastboot boot mi8-twrp-3.2.2.img
Unencrypted via Pattern
Flashed Magisk v16.4 + DM verity disabler file
Reboot
But I'm still stuck at "powered by Android" bootlogo.
Normally it boots within 5 seconds but now it's taking forever. I'll wait a few minutes to see what happens.
I'm attaching some screenshots of the install process.

Padlite said:
Thank you for the fast reply!
I followed that guide and tried these steps:
fastboot boot mi8-twrp-3.2.2.img
Unencrypted via Pattern
Flashed Magisk v16.4 + DM verity disabler file
Reboot
But I'm still stuck at "powered by Android" bootlogo.
Normally it boots within 5 seconds but now it's taking forever. I'll wait a few minutes to see what happens.
I'm attaching some screenshots of the install process.
Click to expand...
Click to collapse
Ok,
but if you install Magisk 16.4, don't install also DM verity disabler.
DM verity disabler is needed if you don't want to root (see poin 14 in the linked guide).
Hope it works...

gulp79 said:
Ok,
but if you install Magisk 16.4, don't install also DM verity disabler.
DM verity disabler is needed if you don't want to root (see poin 14 in the linked guide).
Hope it works...
Click to expand...
Click to collapse
If I only flash Magisk 16.4, then phone shows "Powered by Android" and instantly reboots into stock recovery.
Only way to get it back booting, is performing fastboot flash boot boot.img from stock dipper_global_images_V9.5.13.0.OEAMIFA_20180714.0000.00_8.1_global image
I read somewhere about official and unofficial bootloader unlock. I didn't unlock the bootloader myself. Maybe it has something to do with it?
PS: Anyone had any luck using Magisk with MIUI 9.5.13?

Did you try with a newer magisk version ? ... 16.7 was released 15 day ago
https://github.com/topjohnwu/Magisk/releases
Direct link: https://github.com/topjohnwu/Magisk/releases/download/v16.7/Magisk-v16.7.zip
It´s a good practice to use magisk_uninstaller before flash new one if you had problems.
Direct link: https://github.com/topjohnwu/Magisk/releases/download/v16.7/Magisk-uninstaller-20180719.zip
Please tell us if it´s works

Seems that also others users have this problem
https://forum.xda-developers.com/showpost.php?p=77234924&postcount=6312

punk84z said:
Did you try with a newer magisk version ? ... 16.7 was released 15 day ago
https://github.com/topjohnwu/Magisk/releases
Direct link: https://github.com/topjohnwu/Magisk/releases/download/v16.7/Magisk-v16.7.zip
It´s a good practice to use magisk_uninstaller before flash new one if you had problems.
Direct link: https://github.com/topjohnwu/Magisk/releases/download/v16.7/Magisk-uninstaller-20180719.zip
Please tell us if it´s works
Click to expand...
Click to collapse
I just tried that. Uninstalling and re-installing v16.7. Although it seems now it's doing a few more steps, I'm still getting the recovery bootloop.
Install log screenshot attached.
gulp79 said:
Seems that also others users have this problem
https://forum.xda-developers.com/showpost.php?p=77234924&postcount=6312
Click to expand...
Click to collapse
Exactly that. Maybe we'll need to wait for a supported Magisk version. I'm still wondering what's the difference between our Mi8's that some can get Magisk working and some not. ?

I am running Magisk stable and tmiui 10 from Xiaomi. Eu without any problems.

I have a Mi 8 se and i install the eu rom boot the phone , reboot to twrp wipe and factory reset and installed magisk 16.4 .this is how works for me

i have the same problem too..when using china stable rom 16.7 magisk can be installed successfully tried many times...
flashing global version seems to have this issue...
tried all this steps too but no luck in global rom...

Padlite said:
Hey there! I just got my Xiaomi Mi8 from HK Goldway at Aliexpress. It came with its bootloader already unlocked and a Global ROM flashed.
I wanted to install Magisk but failed horribly . I've already done that to several phones (my last one was a Moto X Play, and it worked without major complications). But with this one, it seems I can't get past the bootlogo.
Stock Fastboot image used:
dipper_global_images_V9.5.13.0.OEAMIFA_20180714.0000.00_8.1_global
This is what I've tried so far:
First try
Flashed TWRP for Mi8 version 0711.
Flashed Magisk.
Got a bootloop.
Reflashed stock image via Fastboot.
Second try
Booted (not flashed) TWRP.
Tried to install latest global weekly from this thread.
Also got a bootloop.
Reflashed stock image via Fastboot.
Third try
I thought that those flashable ZIP firmwares were too small for them to be a full-fledged OS. So I went and downloaded this other one. Global version.
I read somewhere that I needed to format data before flashing a new image, so I did.
Booted TWRP.
Formated data (not Wipe)
Installed that ZIP from TWRP and booted correctly.
Booted TWRP again and flashed Magisk.
Got bootloop.
Back to stock image via fastboot.
Last try
Booted TWRP.
Formatted data.
Installed MIUI via TWRP.
Without rebooting, flashed Magisk and no-verity-opt-encrypt-6.0.zip.
This got past bootlogo ("Unlocked" message changed to "powered by Android") but got stuck there. Not booting at all.
Right now I'm back to the last try, booting MIUI successfully but without Magisk nor no-verity-opt-encrypt.
I kinda have no more ideas left. I understand this is a new device but I can't understand why people claim the have been able to install Magisk and I can't! Other thoughts were, maybe they were running MIUI 10 Beta and it only works with that version? I'm unsure about that.
Can someone lend me a hand? What am I missing?
Thank you!!
Click to expand...
Click to collapse
i allso hade that problem
wen i got my phone it was with global rom
then i flashed twrp
didt like they said
wipe dalvik cache an cache an factory reset
flashed miui eu rom
then flashed twrp again rebooted into recovery
flashed magisk 16.4
ended up in staying on android logo
then i try format data an didt it all again
still android logo an nothing more
well then i didt what i allways didt on my other devices
i wiped dalvik cache
cache
data
system
then i flashed eu rom
an twrp again rebooted into recovery again
then flashed magisk 16.4
rebooted system an now it booted up
REMEMBER to manke a backup before flashing all off thise things otherwice u wont have the option to go back if something goes wrong

-fluffy- said:
i allso hade that problem
wen i got my phone it was with global rom
then i flashed twrp
didt like they said
wipe dalvik cache an cache an factory reset
flashed miui eu rom
then flashed twrp again rebooted into recovery
flashed magisk 16.4
ended up in staying on android logo
then i try format data an didt it all again
still android logo an nothing more
well then i didt what i allways didt on my other devices
i wiped dalvik cache
cache
data
system
then i flashed eu rom
an twrp again rebooted into recovery again
then flashed magisk 16.4
rebooted system an now it booted up
REMEMBER to manke a backup before flashing all off thise things otherwice u wont have the option to go back if something goes wrong
Click to expand...
Click to collapse
Well maybe the critical step is to wipe everything, including System.
Did you Format anything instead of Wipe this last try?
Also, could you please share a link from that working MIUI rom?
Thank you!

Sorry for double-posting, but I wanted to notify you I GOT IT!
Over here, user @richardyusan helped me out with an extra step.
What I did:
Installed Magisk V16.7
Installed DM-VERITY AND FORCED ENCRYPTION DISABLER.
Performed fastboot format userdata
Rebooted
And I got my phone booting with Magisk Installed!
Even though I couldn't install any module, (every install claimed I needed Magisk v15+). I read some threads and with a Magisk Direct re-install (from its app) I got Magisk downgraded to v16 and everything worked perfectly!
Here are some screenshots!

Padlite said:
Sorry for double-posting, but I wanted to notify you I GOT IT!
Over here, user @richardyusan helped me out with an extra step.
What I did:
Installed Magisk V16.7
Installed DM-VERITY AND FORCED ENCRYPTION DISABLER.
Performed fastboot format userdata
Rebooted
And I got my phone booting with Magisk Installed!
Even though I couldn't install any module, (every install claimed I needed Magisk v15+). I read some threads and with a Magisk Direct re-install (from its app) I got Magisk downgraded to v16 and everything worked perfectly!
Here are some screenshots!
Click to expand...
Click to collapse
Is Google Assistant ("OK Google") working for you now as well?

I just flashed magisk v16.0 over the Miui 8.7.26 build and it booted without issues.

japancakes said:
Is Google Assistant ("OK Google") working for you now as well?
Click to expand...
Click to collapse
I just checked and no. If I go to Google Settings -> Voice, Voice Match is disabled because "This feature is currently unavailable for this language". Even though it's set to English UK. Maybe there is some Magisk Module to enable it?

Thanks, followed these steps and it got magisk going on the recent global release. Only difference was i had to use fastboot erase userdata.
Padlite said:
Scroll down over this post to see anwer!
EDIT: FIX!
Over here, user @richardyusan helped me out with an extra step.
What I did:
Installed Magisk V16.7.
Installed DM-VERITY AND FORCED ENCRYPTION DISABLER.
Performed fastboot format userdata.
Rebooted.
And I got my phone booting with Magisk Installed!
Even though I couldn't install any module, (every install claimed I needed Magisk v15+). I read some threads and with a Magisk Direct re-install (from its app) I got Magisk downgraded to v16 and everything worked perfectly!
Hope this works out for everyone having this problem!
Click to expand...
Click to collapse

Hey guys im a toal newbie to this whole flash theme but Ive purchased a mi8 and i would like to use GooglePay and so on, could someone give me a step by step tutorial , how to install all this stuff on my device ?

Padlite said:
Sorry for double-posting, but I wanted to notify you I GOT IT!
Over here, user @richardyusan helped me out with an extra step.
What I did:
Installed Magisk V16.7
Installed DM-VERITY AND FORCED ENCRYPTION DISABLER.
Performed fastboot format userdata
Rebooted
And I got my phone booting with Magisk Installed!
Even though I couldn't install any module, (every install claimed I needed Magisk v15+). I read some threads and with a Magisk Direct re-install (from its app) I got Magisk downgraded to v16 and everything worked perfectly!
Here are some screenshots!
Click to expand...
Click to collapse
well i didt not flash dm-verity an mine pass saftynet

TWRP gets replaced by stock recovery

So I've used TWRP r16 and it throws an "Image not signed or corrupt" error as suggested by other users I ignored it, but everytime I reboot to system and try to get to recovery "no command" show's up meaning TWRP was replaced by stock recovery all help will be appreciated.
Thanks

Akash731 said:
So I've used TWRP r16 and it throws an "Image not signed or corrupt" error as suggested by other users I ignored it, but everytime I reboot to system and try to get to recovery "no command" show's up meaning TWRP was replaced by stock recovery all help will be appreciated.
Thanks
Click to expand...
Click to collapse
You need to flash Magisk after flashing TWRP
1. Flash Latest TWRP
2. Reboot to TWRP
3. Flash Magisk
If you boot in to system after flashing TWRP, TWRP will be removed

pradeeppk said:
You need to flash Magisk after flashing TWRP
1. Flash Latest TWRP
2. Reboot to TWRP
3. Flash Magisk
If you boot in to system after flashing TWRP, TWRP will be removed
Click to expand...
Click to collapse
Hey thanks that worked.
But everytime I boot to system and boot to twrp the data gets encrypted and I can't access the files do you happen to know any solution for this?

Akash731 said:
Hey thanks that worked.
But everytime I boot to system and boot to twrp the data gets encrypted and I can't access the files do you happen to know any solution for this?
Click to expand...
Click to collapse
If you are on stock Rom, according to my knoweldge it is not possible to remove encryption, if you format your date in twrp for removing encryption then reboot to system you can see that the phone is again encrypted.
But in custom roms this doesnt happen.

pradeeppk said:
You need to flash Magisk after flashing TWRP
1. Flash Latest TWRP
2. Reboot to TWRP
3. Flash Magisk
If you boot in to system after flashing TWRP, TWRP will be removed
Click to expand...
Click to collapse
pradeeppk said:
If you are on stock Rom, according to my knoweldge it is not possible to remove encryption, if you format your date in twrp for removing encryption then reboot to system you can see that the phone is again encrypted.
But in custom roms this doesnt happen.
Click to expand...
Click to collapse
I don't want to try custom rom's as this is my main device guess I'm stuck with the encryption then thanks for your help. :good:
Edit:-
Tried TWRP r20 it decrypts fine thanks

pradeeppk said:
You need to flash Magisk after flashing TWRP
1. Flash Latest TWRP
2. Reboot to TWRP
3. Flash Magisk
If you boot in to system after flashing TWRP, TWRP will be removed
Click to expand...
Click to collapse
You don't have to flash Magisk after flashing TWRP. The two are unrelated.
After flashing TWRP you have to boot into recovery, not system. Once TWRP was started, you can reboot into system. No need for Magisk (unless you want Magisk anyway).

gewe said:
You don't have to flash Magisk after flashing TWRP. The two are unrelated.
After flashing TWRP you have to boot into recovery, not system. Once TWRP was started, you can reboot into system. No need for Magisk (unless you want Magisk anyway).
Click to expand...
Click to collapse
It will not work in stock ROM, if you flash a custom rom there is no need to flash Magisk.
You should flash Magisk or custom kernel after flashing TWRP otherwise it will be erased.
Google about TWRP erasing after reboot you should get too many posts regarding this
This is one of them
https://forum.xda-developers.com/oneplus-3t/help/twrp-deleted-booting-t3769867

pradeeppk said:
It will not work in stock ROM, if you flash a custom rom there is no need to flash Magisk.
You should flash Magisk or custom kernel after flashing TWRP otherwise it will be erased.
Google about TWRP erasing after reboot you should get too many posts regarding this
This is one of them
https://forum.xda-developers.com/oneplus-3t/help/twrp-deleted-booting-t3769867
Click to expand...
Click to collapse
I am using stock ROM, and yes, also Magisk (installed later). IIRC Magisk is not needed for TWRP to work. When I receive the next OTA notification, I will test this.
The thread you are referring to is for a OnePlus 3T. For our device this is the thread: https://forum.xda-developers.com/moto-g5s-plus/development/recovery-twrp-3-1-1-r7-t3694910.
Since there is no official TWRP for the Moto G5S Plus, I took the following text from the TWRP page for the Moto G5S.
Note many devices will replace your custom recovery automatically during first boot. To prevent this, use Google to find the proper key combo to enter recovery. After typing fastboot reboot, hold the key combo and boot to TWRP. Once TWRP is booted, TWRP will patch the stock ROM to prevent the stock ROM from replacing TWRP. If you don't follow this step, you will have to repeat the install.
Click to expand...
Click to collapse
Instead of that you can also use fastboot reboot-bootloader, and then from the bootloader start recovery.

pradeeppk said:
It will not work in stock ROM, if you flash a custom rom there is no need to flash Magisk.
You should flash Magisk or custom kernel after flashing TWRP otherwise it will be erased.
Google about TWRP erasing after reboot you should get too many posts regarding this
This is one of them
https://forum.xda-developers.com/oneplus-3t/help/twrp-deleted-booting-t3769867
Click to expand...
Click to collapse
Two days ago I received a notification for an OTA update, containing the August 2019 security patches.
After going back to stock ROM, installing all the updates up to the latest, I installed TWRP. After booting into recovery, and then into system, and recovery again, TWRP was gone. Strange, I don't remember this happening before. Maybe I always installed Magisk before booting into system.
Bottom line: you were right, I was wrong. Thanks for pointing it out.

gewe said:
Two days ago I received a notification for an OTA update, containing the August 2019 security patches.
After going back to stock ROM, installing all the updates up to the latest, I installed TWRP. After booting into recovery, and then into system, and recovery again, TWRP was gone. Strange, I don't remember this happening before. Maybe I always installed Magisk before booting into system.
Bottom line: you were right, I was wrong. Thanks for pointing it out.
Click to expand...
Click to collapse
As like you said this is the first time in my life i need to flash magisk to stick twrp.
I usualy doesn't use root or custom roms, install twrp, remove unnecessary apps from stock system, replace host files with adaway hosts, replace or edit gps config files. and continue using stock.
This is the main routine from Android 1.5
(Samsung spica (i think it was the first Android phone from Samsung)).
It may be due to security reason stock kernel or system delete twrp.
When installing magisk it patch stock boot image, that may be the reason of twrp remains after flashing magisk.

Help with Magisk root Pixel 2 factory Android 9.0.0 installed

Hello,
I have been struggling to root my device. I have not wiped and rooted it in some time and now coming back to it again magisk keeps breaking my device.
I have clean flashed the latest android 9.0.0 build. I have flashed TWRP custom recovery 3.3.0 successfully. I have tried to flash magisk 3 times now and afterwards my phone wont boot. I originally used magisk manager to get the latest zip and patch my boot image. I then rebooted to to bootloader and ran fast boot flash boot patched_Magisk.img. This wiped out my twrp recovery and my phone wouldn't boot, i couldn't get back into twrp recovery. I reflashed latest 9.0 build and wiped everything. I flashed twrp again and tried to flash Magisk 20.0 from recovery. It was successful but again i couldn't boot into my phone and it eventually restarted back into recovery which i still had twrp this time. I then tried it again with 19.3 and the same thing happened. can anyone tell me what is going on here? What am I missing? I have been having reflash factory 9.0 build each time just to get it to remove the patched boot image and boot up again.

Was either the TWRP version or the two check boxes it has now to install twrp app as system. Installed 3.2.3-1 and didnt install the twrp app through the recovery check boxes and it worked.