Re-Lock bootloader? - OnePlus 3T Questions & Answers

I unlocked my bootloader, installed twrp and several roms to try them out, then decided to go back to stock. Currently have OOS 3.5.4 installed with stock recovery (that came with the toolkit). However, whenever I try to lock the booltloader again, the phone won't boot up. It will bootloop, or just stay off with the led glowing white. I tried to sideload the stock ROM from OnePlus, but it fails after about 45% completion. I tried both 3.5.3 and 3.5.4 and both fail after about 45%. The only way to get the phone to boot again is by unlocking the bootloader again, then it boots just fine. Tried unlocking with the toolkit as well as fastboot oem lock. Both give me the prompt on the phone, then wipe the phone and go into the bootloop.
Any suggestions on how to re-lock the bootloader? I want to be able to get the OTA update, which I think will fail with an unlocked bootloader. Note, I have also tried loading the Nougat update from settings - system update - local upgade (both full and update) and they also fail to load shortly after booting to recovery.
Thanks,
TR

Instead of using the toolkit, try just doing it manually.
fastboot oem lock IS the correct way to lock the bootloader.
If you're running into all those issues, try to reflash the stock rom from the official site. OR try this
NOTE: This WILL wipe everything on your phone so make a backup first!
First Unlock booloader​1. On your phone go into Developer screen (Settings --> Developer Options)
If you don't have this go back to Settings --> About Device. Tap "Build number" 7-10 times to unlok developer options
2. In Developer Options turn on "USB Debugging" and "OEM Unlock"
3. Open ADB in command prompt and go to the directory where ADB is.
Type adb reboot bootloader
4. Once your device is in fastboot mode, type in fastboot devices to make sure your device is listed
5. Type in fastboot oem unlock to unlock your device bootloader
You can check to make sure it was properly unlocked by typing in fastboot oem device-info.
6. Reboot into your system
Files we need​7. Download the following files:
TWRP - https://build.nethunter.com/test-builds/twrp/oneplus/twrp-3.0.2-0-oneplus3t.img
No-verity-opt-encrypt - https://build.nethunter.com/android-tools/no-verity-opt-encrypt/no-verity-opt-encrypt-5.0.zip
Magisk - http://tiny.cc/latestmagisk
Phh-Superuser - https://forum.xda-developers.com/attachment.php?attachmentid=3988488&d=1483407725
Latest Stable Nougat Rom - http://otafsc.h2os.com/patch/amazon...s3TOxygen_28_OTA_035_all_1612310259_2dc0c.zip
8. Copy all the files to your phone (keep the original on your pc just in case)
9. Load back up to fastboot mode
In ADB type adb reboot bootloader
10. Flash twrp img we downloaded above by typing
fastboot flash recovery twrp-3.0.2-0-oneplus3t.img
11. After this reboot into the system
Install all of our downloaded files through TWRP​12. Now boot into recovery by issuing the following ADB command
adb reboot recovery (you should go into TWRP)
13. Once you're in twrp flash the "no-verity-opt-encrypt-5.0.zip" file OR you can format the data partition to f2fs to prevent the dm-verity error.
14. Now install the stock stable nougat rom we downloaded above
15. Do a factory system wipe / cache & dalvik
16. Install magisk through TWRP
17. Wipe cache/dalvik
18. Install phh SuperUser
19. Now reboot into the system normally.
NOTE: This *COULD* take a while since you did a clean install of nougat so just be patient and you should be good to go after this.

Thanks for the reply.
I did do fastboot oem lock, and it results in an unbootable system. fastboot oem unlock makes it bootable again. Not sure why. Also, whenever I do adb sideload <any_rom> it fails after about 45%. Not sure what's happening. Your instructions would get me to Nougat with TWRP and an unlocked bootloader, which may be what I end up doing, but I was trying to get back to fully stock, and locked again, so that OTA's will work properly. If nothing else works, I will go the route you suggest above.
Thanks again!

I just figured I'd try to get you to a working system/phone. After you get all that working you can probably lock your bootloader back to default. Now, I'm not 100% sure, but I believe that if you have a custom recovery you will need to restore that to stock as well before setting the bootloader back to locked.

TXRangerXDA said:
I unlocked my bootloader, installed twrp and several roms to try them out, then decided to go back to stock. Currently have OOS 3.5.4 installed with stock recovery (that came with the toolkit). However, whenever I try to lock the booltloader again, the phone won't boot up. It will bootloop, or just stay off with the led glowing white. I tried to sideload the stock ROM from OnePlus, but it fails after about 45% completion. I tried both 3.5.3 and 3.5.4 and both fail after about 45%. The only way to get the phone to boot again is by unlocking the bootloader again, then it boots just fine. Tried unlocking with the toolkit as well as fastboot oem lock. Both give me the prompt on the phone, then wipe the phone and go into the bootloop.
Any suggestions on how to re-lock the bootloader? I want to be able to get the OTA update, which I think will fail with an unlocked bootloader. Note, I have also tried loading the Nougat update from settings - system update - local upgade (both full and update) and they also fail to load shortly after booting to recovery.
Thanks,
TR
Click to expand...
Click to collapse
I also have the same problem, after the bootloader lock the phone does not start.
I tried with all the possible procedures, also even the rom flash in local and sideload it does not work, It comes to 45% and then fails.
we will highlight the problem, so everyone will know and maybe there is a solution

m0d hipp¥ said:
I just figured I'd try to get you to a working system/phone. After you get all that working you can probably lock your bootloader back to default. Now, I'm not 100% sure, but I believe that if you have a custom recovery you will need to restore that to stock as well before setting the bootloader back to locked.
Click to expand...
Click to collapse
But of course, you can't relock phone with a non standard recovery. Replace TWRP with the ROMs real recovery and relock will work again.

That's what I figured. Thanks for the confirmation.

Use the unbrick tutorial to go back to stock
This is what i did
https://forum.xda-developers.com/oneplus-3t/how-to/unbrick-unbrick-tutorial-oneplus-3t-t3515306

pitrus- said:
But of course, you can't relock phone with a non standard recovery. Replace TWRP with the ROMs real recovery and relock will work again.
Click to expand...
Click to collapse
I'm sorry, even with the stock recovery but does not work, it was the first thing I did

You can a unbick tutorial. It worked for my OnePlus 3T. Just search up How to unbrick (whatever OnePlus device you have) on Google. Then follow all the instructions carefully. If you need help with it I could try to do a remote session with you. Edit: It will erase all data and you will boot with oos 3.5.3 ( I also had the same issue as you. But I couldn't install any zip with stock recovery or adb side load.

Haven't seen nothing on the fórum about this particular subject, locking the bootloader seems a problem in this phone

enokack said:
Haven't seen nothing on the fórum about this particular subject, locking the bootloader seems a problem in this phone
Click to expand...
Click to collapse
Only if you have modified the phone in some way or another (like rooting and installing twrp) before trying to re-lock.
If you keep it stock, you should be able to re-lock. Or else, just use the Qualcomm restore method to re-lock.

tried this
OK what i did was when the phone was starting and vibrating I push the power bottom and volume down bottom at the same time ,then i connected the phone to the PC,from the panel in the phone there are 3 categories to erase everything on the phone I did it all(1,2,3) and then I put the phone in ADB mode from the control panel in the phone,After that I flash via fastboot the original .zip from one plus for the version 4.0.3 (1.4 GB) ,when it finished I restarted and the phone started normal again,I hope this help someone alse,I was so desesperated:silly:.

I think the problem in re-locking it is the modified boot image. Locked bootloaders don't support those.

re-locking bootloader will getback the warranty ???

No solutions till now

enokack said:
Haven't seen nothing on the fórum about this particular subject, locking the bootloader seems a problem in this phone
Click to expand...
Click to collapse
Its three easy steps, no need to use any toolkit just follow the instructions. https://forums.oneplus.net/threads/...-3-3t-and-go-back-completely-to-stock.456232/

Abrar123 said:
re-locking bootloader will getback the warranty ???
Click to expand...
Click to collapse
Unlocking the bootloader does not void the warranty on this device:
https://oneplus.net/support/answer/will-rooting-or-unlocking-the-bootloader-void-my-warranty

Once I have root, is there a command to re-lock and later eventually unlock the bootloader again?
I remember this was possible with google nexus devices, there was a shell command (require root) that was able to change bootloader status

Related

Help relocking bootloader

Hello team,
I had 4.03 with unlocked BL and TWRP installed. I reinstalled the stock N recovery first. When I use the command "fastboot oem lock" it ask me to say yes and I do, it reboots and flashes the white symbol and reboots, stuck in this bootloop. Anybody seen this before or have a fix? I am trying to restore to stock to sell.
thanks,
Nope I didn't have an issue like you. 2 attempt of going back to stock and never had an issue. Did you successfully flash the stock recovery?
Just use the unbrick meathod it resets everything
kingheri1 said:
Nope I didn't have an issue like you. 2 attempt of going back to stock and never had an issue. Did you successfully flash the stock recovery?
Click to expand...
Click to collapse
Yes- I did flash the stock recovery. But when I do the "fastboot oem lock" it just boot loops- any ideas?
aaronc_98 said:
Hello team,
I had 4.03 with unlocked BL and TWRP installed. I reinstalled the stock N recovery first. When I use the command "fastboot oem lock" it ask me to say yes and I do, it reboots and flashes the white symbol and reboots, stuck in this bootloop. Anybody seen this before or have a fix? I am trying to restore to stock to sell.
thanks,
Click to expand...
Click to collapse
You should never lock the bootloader with non stock recovery or boot image. The security in newer devices is a lot meaner.
There are two ways you can resolve this:
Method 1:
You'll need to unlock the bootloader first. Try getting into fastboot and run "fastboot oem unlock".
If it allows unlocking you're done, just flash everything stock (first the recovery and then OOS 4.0.3 via the ADB option in the recovery). Then, go to fastboot and relock the bootloader. Should work since it worked many times for me.
Method 2:
If it doesn't allow and you're in TWRP you can't do any flashing since the locked bootloader won't allow TWRP to boot.
In this case, contact OnePlus Support via Live Chat and tell them you got a software issue with your phone.
They'll give you links to three files needed for flashing the device. Download those and let them know. They'll flash your device via remote support within a week. No matter what S/W state it is in.
Hope it helps

TWRP Install Being Rejected??

Hello,
I am new to this forum, but have done a bit of unlocking and installing custom roms on other phones (mostly OPO's, both my old one and friends). But this new OP 3T I just got is giving me some troubles I have not encountered before. I would LOVE to put this into the correct forum, but of course with my being new to this forum...rules...
I am following the standard install over on the TWRP site and on the OP3T, the install finishes and then I reboot and I get a screen that says:
"Your device has been unlocked and can't be trusted. If you don't want to see this screen, please lock your device by "fastboot oem lock" an erase userdata..."
I have never seen this before. Can someone give me a idea what could be going on here? Do I need to re-lock it? What did OP do to their phones!!?!
Oh and also, I am planning on installing LineageOS. Any reason I shouldn't?
Thanks!
Blenderite said:
Hello,
I am new to this forum, but have done a bit of unlocking and installing custom roms on other phones (mostly OPO's, both my old one and friends). But this new OP 3T I just got is giving me some troubles I have not encountered before. I would LOVE to put this into the correct forum, but of course with my being new to this forum...rules...
I am following the standard install over on the TWRP site and on the OP3T, the install finishes and then I reboot and I get a screen that says:
"Your device has been unlocked and can't be trusted. If you don't want to see this screen, please lock your device by "fastboot oem lock" an erase userdata..."
I have never seen this before. Can someone give me a idea what could be going on here? Do I need to re-lock it? What did OP do to their phones!!?!
Oh and also, I am planning on installing LineageOS. Any reason I shouldn't?
Thanks!
Click to expand...
Click to collapse
Is nothing wrong with your device ..What you get is a warning that your bootloader is unlocked ...
You gonna get this every time you want to boot to your ROM or to twrp....
You can proceed further to install any ROM that you like...
I think you can find a guide on XDA forums to disable this warning if you want...
cultofluna said:
Is nothing wrong with your device ..What you get is a warning that your bootloader is unlocked ...
You gonna get this every time you want to boot to your ROM or to twrp....
You can proceed further to install any ROM that you like...
I think you can find a guide on XDA forums to disable this warning if you want...
Click to expand...
Click to collapse
Ok I tried that and a new problem came up!! When I try to reboot into recovery, I do not get TWRP, but the stock recovery that was there originally! Unless they have completely changed the look of TWRP. I will try to upload a picture of it if that helps.
You can't get rid of the bootloader-unlocked warning without re-locking your bootloader, which you really should not do while you have a custom recovery installed.
Are you sure you've flashed TWRP and not just booted it it from a local file on your computer? Try using fastboot to wipe recovery first before flashing TWRP.
Anova's Origin said:
You can't get rid of the bootloader-unlocked warning without re-locking your bootloader, which you really should not do while you have a custom recovery installed.
Are you sure you've flashed TWRP and not just booted it it from a local file on your computer? Try using fastboot to wipe recovery first before flashing TWRP.
Click to expand...
Click to collapse
I followed the Fastboot method on this page (rules won't let me post the link normally): twrp. me/devices/oneplus3t.html
Blenderite said:
I followed the Fastboot method on this page (rules won't let me post the link normally): twrp. me/devices/oneplus3t.html
Click to expand...
Click to collapse
Right on that page (last paragraph of fastboot install method), you will see:
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.
I had a heck of a time with this myself (even reading the above). Even rebooting (after flash TWRP) to recovery (power+vol down), the TWRP install would still not "stick". Had to try multiple times. I also rooted with SuperSU 2.79 at some point in that process, which may or may not have helped TWRP to finally "stick".
redpoint73 said:
Right on that page (last paragraph of fastboot install method), you will see:
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.
I had a heck of a time with this myself (even reading the above). Even rebooting (after flash TWRP) to recovery (power+vol down), the TWRP install would still not "stick". Had to try multiple times. I also rooted with SuperSU 2.79 at some point in that process, which may or may not have helped TWRP to finally "stick".
Click to expand...
Click to collapse
I tried this once before, but after your suggestion to try it several times, it finally worked! Thanks!!
Flash TWRP, reboot, press the volume down key before the phone boots, go into recovery, you should see TWRP flash screen, that usually works but I'm glad you got it going

Rooting Problems Need Help

Hi I'm a new Android user and don't know much about it :'( I recently got my OnePlus 3T and I wanted to root it
so I followed a tutorial video from YouTube successfully unlocked bootloader and flashed twrp recovery then I tried to install SuperSU... well it installed but the device got soft bricked when I rebooted after finishing the installation and wiping cache/dalvik
then I format/factory reset everything using twrp recovery and it's working now but the device isn't rooted :'( tried to install SuperSU again and it got bricked again
Also I'm getting these messages on the startup screen-
1st one: Your device has been unlocked and can't be trusted. If you don't want to see this screen please lock your device by "fastboot oem lock" and erase user data.
2nd one: The dm-verity is not started in enforcing mode and may not work properly.
(My os version is 4.1.7)
device OP 3t A3010
plz help me :'(
The 1st and the 2nd msg that gets displayed is shown because the bootloader is unlocked..
Bootloops are common while flashing su...when I flashed super su for the first time, I got 3 or 4 random reboots and took almost 7 to 10 mins for the phone to boot up..
I would suggest using Magisk as a rooting method instead of SuperSU. If you use SuperSU then some apps can detect root and object to you being rooted and Google's SafetyNet gets triggered. Magisk solves this by trying to hide root from apps and Google so that you can use your device as if it wasnt rooted at all (but in fact is rooted). Go the the Magisk forum and download Magisk 13.3 zip from there.
I am assuming you are using OxygenOS (Oneplus's software) and not a custom ROM. Download the Open Beta or Stable build from here/
These steps will erase all the data on your phone permanently (including internal storage) so please backup anything in there.
To fix the DM verity error youll have to follow the steps outlined here
Once you have fixed that, flash oneplus recovery via fastboot which you can download here
To flash it go to fastboot mode, and cd into the folder where you downloaded it. Run the command 'fastboot flash recovery <RECOVERY_NAME>'.
Then run the command 'fastboot oem lock' to lock the bootloader. After you confirm the prompt on screen, the phone will boot into the recovery and youll see a progress bar. Once the progress completes and the screen turns off, be ready to immediately go back to fastboot mode by pressing volume up and power.
When you enter fastboot mode again, run the command 'fastboot oem unlock' and follow the same steps as before.
Once you are in fastboot mode, the phone is now in a clean state with no OS.
Follow the steps outlined on the oneplus website to flash a clean OxygenOS build (stable or open beta as per your taste)
Once the flashing is complete you have to let the phone boot up completely once. When you get to the setup screen, go through it and reach the launcher.
Now we flash TWRP recovery. Reboot to fastboot again. Flash TWRP recovery (I personally use blu_spark's twrp but you can use one of your choice). When it is done, boot into the recovery. Youll now be able to copy magisk zip into the internal sd. Do that, and flash it. Reboot.
Youll now be rooted. If you have any problems holla at me.

Failed to install global rom via mi flashing tool, now phone stuck on fast boot.

Solved !!!
I was able to flash global miui 9.5.
Hi ,
So after finally the bootloader is unlocked I tried to flash the global rom via mi flash tool.
Update failed and an error message is update crc list failed !
I tried flashing back the chinse rom and I get the same error.
I can boot the device to recovery mode, but its mi recovery 3.0, I have 3 options:
1.wipe data
2. boot to system
3. connect via pc suite
tried with pc suite but it says my device isn't supported.
The computer recognizes the device via MiFlash tool but in adb via cmd when I type adb devices I get blank row and its unable to find the device.
how can I make my phone usable again please?
I have tried many things I found on google but nothing worked.
Thank you all
Hi
Is fastboot mode able?
Try to unlock again.
what do you mean able?
the phone is recognized via Mi Flash tool but in adb via cmd it is not recognized.
I waited 700 hours for the unlock and the phone is unlocked.
can you explain please what is fastboot able and what do you mean to try to unlock again?
thx
Hi
Could you start the phone in fastboot mode?
StupiduserHH said:
Hi
Could you start the phone in fastboot mode?
Click to expand...
Click to collapse
yes the phone is in fastboot mode, and I cant back to normal mode for regular use.
I tried to unlock again like you said it the program said the device is already unlocked.
Have you tried the first option, wipe data?
Don't panick, since you have fastboot mode it's not bricked. Let's start by booting into TWRP.
Download TWRP and put it in the same directory with your FASTBOOT.exe file.
Open a windows dos prompt and get to the same directory as your FASTBOOT file.
Reboot your phone into FASTBOOT mode.
in your DOS prompt type "Fastboot boot yourrecoveryfilename.img" (change the yourrecoveryfilename.img to the TWRP recovery image file you downloaded)
your phone should reboot into TWRP if there wasn't an error. TWRP won't be permanent (if you reboot out of TWRP it won't retain it), but will allow you to flash ROM.
I've only ever flashed all my ROMs through TWRP, never used anything else since i unlocked the phone.
Let me know how this goes.
fastboot .exe file,where can i get it
_katho_ said:
Have you tried the first option, wipe data?
Click to expand...
Click to collapse
wherecan i download this fastboot file
Hello all.
Big screw up, I think. So I've had my MI 8 for a while now, no issues, until today I decided to install official lineage on it. The bootloader was unlocked. I flashed TWRP, but every time I rebooted the phone, it would go back to stock recovery, not TWRP. So here the issue started:
- Via Mi flash tool, I reflashed global MIUI 10 back to stock. I didn't realize I had relocked the bootloader...
- I tried reflashing TWRP without realizing I had relocked the bootloader.
- Thinking that the TWRP flash was done incorrectly again, I simply wanted to go back to stock, and attempted to use the mi flash tool to reflash, once again, the global stock MIUI 10. the flash tool said it was a success. (I still didn't realize I was on a locked bootloader)
- I am now on a bootloop. I can't get past the stock recovery screen, but I can go into fastboot. The recovery screen has a warning that the ROM cannot be used on the phone.
- I tried re unlocking the bootloader with the unlock tool, but because my Mi account credentials are not input on the phone (the phone was wiped clean), I cannot re unlock it.
What can I do? How can I get out of the bootloop, and hopefully re unlock and flash global rom clean again?
dancarriv said:
Hello all.
Big screw up, I think. So I've had my MI 8 for a while now, no issues, until today I decided to install official lineage on it. The bootloader was unlocked. I flashed TWRP, but every time I rebooted the phone, it would go back to stock recovery, not TWRP. So here the issue started:
- Via Mi flash tool, I reflashed global MIUI 10 back to stock. I didn't realize I had relocked the bootloader...
- I tried reflashing TWRP without realizing I had relocked the bootloader.
- Thinking that the TWRP flash was done incorrectly again, I simply wanted to go back to stock, and attempted to use the mi flash tool to reflash, once again, the global stock MIUI 10. the flash tool said it was a success. (I still didn't realize I was on a locked bootloader)
- I am now on a bootloop. I can't get past the stock recovery screen, but I can go into fastboot. The recovery screen has a warning that the ROM cannot be used on the phone.
- I tried re unlocking the bootloader with the unlock tool, but because my Mi account credentials are not input on the phone (the phone was wiped clean), I cannot re unlock it.
What can I do? How can I get out of the bootloop, and hopefully re unlock and flash global rom clean again?
Click to expand...
Click to collapse
Here I made this thread for you : https://forum.xda-developers.com/mi-8/how-to/how-to-install-roms-resolve-issues-t3911611
tsongming said:
Here I made this thread for you : https://forum.xda-developers.com/mi-8/how-to/how-to-install-roms-resolve-issues-t3911611
Click to expand...
Click to collapse
I finally got around fixing this. It turns out my phone was China, with Global ROM. So I did an EDL test point method and paid someone with an authorized account to access my laptop remotely to Flash the latest China ROM. I waited the required period for bootloader unlocking, and it's back alive!
I'm running official lineage 16, and I'm pretty happy with the results. I'm Using it as a daily driver instead of my all stock pixel 2 XL. No issues.
dancarriv said:
I finally got around fixing this. It turns out my phone was China, with Global ROM. So I did an EDL test point method and paid someone with an authorized account to access my laptop remotely to Flash the latest China ROM. I waited the required period for bootloader unlocking, and it's back alive!
I'm running official lineage 16, and I'm pretty happy with the results. I'm Using it as a daily driver instead of my all stock pixel 2 XL. No issues.
Click to expand...
Click to collapse
That's great news! It sucks that you were tricked into thinking your that phone is a global version. But at least you able to get things permanently sorted.
Sent from my Xiaomi MI 8 using XDA Labs
Agimax said:
Don't panick, since you have fastboot mode it's not bricked. Let's start by booting into TWRP.
Download TWRP and put it in the same directory with your FASTBOOT.exe file.
Open a windows dos prompt and get to the same directory as your FASTBOOT file.
Reboot your phone into FASTBOOT mode.
in your DOS prompt type "Fastboot boot yourrecoveryfilename.img" (change the yourrecoveryfilename.img to the TWRP recovery image file you downloaded)
your phone should reboot into TWRP if there wasn't an error. TWRP won't be permanent (if you reboot out of TWRP it won't retain it), but will allow you to flash ROM.
I've only ever flashed all my ROMs through TWRP, never used anything else since i unlocked the phone.
Let me know how this goes.
Click to expand...
Click to collapse
Hey, so I don't want to spam you, but seems like you really know about this and I desperately need some help...
Could you please take a look at my thread? https://forum.xda-developers.com/xi...nt/help-bricked-mi-mix-2s-installing-t4131269
Thank you

Mi 9 stuck in Fastboot after TWRP Backup Restore.

Hello,
I tried the latest V11.0.6.0.QFAEUXM ROM but I didn't like it and so I booted into my TWRP recovery and restored the latest fullbackup I made from 2 days ago, then rebooted.
Now I'm stuck in Fastboot loop.
$ fastboot reboot
and
$ fastboot reboot recovery
... have literally no effect, still the phone is stuck in fastboot mode uppon restart.
I read in another thread "just use MiFlash tool and revert to stock rom, do everything all over to rescue your phone".
OK, fine. I start MiFlash, it asks me to unlock my phone... I click unlock. Nothing happens, I click again "try unlock again", then "no need to repeat unlock" appears, nothing happens, the usual menu with the options to flash or install TWRP are missing.
:good: really good! Just as expected. Very user friendly.
Now what?
I had twrp-3.3.1-37-cepheus-mauronofrio.img (SHA-1: A3230E7918A9E3D3D939AA8619B40E47A54F645D) as recovery and my ROM was xiaomi.eu_multi_MI9_V11.0.4.0.QFACNXM_5e64190eb9_v11-10.zip (SHA-1: 714BD02A5D52720C2733E2FDA9730EECE441AE09) before I tried to flash miui_CEPHEUSEEAGlobal_V11.0.6.0.QFAEUXM_1647340073_10.0.zip (SHA-1: BAC6307DA99F766E35A6EDBB0B74D02F73AD2782) and everything went downhill from there.
MiFlash version: miflash_unlock-en-3.5.719.27.zip
Is there more info I can provide?
EDIT / UPDATE:
I've been following the instructions from a Youtube video (links below) by the letter and now at least I'm back in a sane / stock ROM state where I can (have to) redo everything fromm the beginning.
Sources:
https://www.youtube.com/watch?v=GuAHNFjK--o
Instructions:
https://highonandroid.com/android-s...rick-unroot-xiaomi-android-stuck-on-fastboot/
Download site:
https://xiaomifirmware.com/roms/download-official-miui-roms-for-xiaomi-mi-9/
(I downloaded & used "cepheus_eea_global_images_V10.2.17.0.PFAEUXM_20190327.0000.00_9.0_eea_b2470d1b08.tgz")
I chose "clean all" as flash method in that XiaomiMiFlash Tool.
It will reboot into Stock ROM, in my case I chose the EU version.
From there you can activate Developer Options & USB-Debugging again and you're set to go customizing again.
Ohhh looks not amazing
Did you've tried to flash recovery via adb?
Laptapper said:
Ohhh looks not amazing
Did you've tried to flash recovery via adb?
Click to expand...
Click to collapse
I tried:
$ fastboot flash recovery twrp-3.3.1-37-cepheus-mauronofrio.img
$ fastboot reboot recovery
It boots straight into Fastboot again.
I don't even know what to say at this point. I literally only wanted to restore a fullbackup. How can this possibly happen in the first place?
I'm really close to smashing this phone in 1000 pieces...
anthropaki said:
I tried:
$ fastboot flash recovery twrp-3.3.1-37-cepheus-mauronofrio.img
$ fastboot reboot recovery
It boots straight into Fastboot again.
I don't even know what to say at this point. I literally only wanted to restore a fullbackup. How can this possibly happen in the first place?
I'm really close to smashing this phone in 1000 pieces...
Click to expand...
Click to collapse
What I suggest you to do is flash the latest TWRP from Mauronofrio which is 3.3.1-52.
After successfully flashing the recovery, immediately press vol up + power button until it reboots.
Do not reboot using the command line or turn off your phone.
In TWRP, flash the xiaomi.eu ROM version that your backup is based on.
Then perform a restore from the backup that you had made.
Sent from my MI 9 (Cepheus) using Tapatalk
Thanks, but I fixed it already.
As I described / updated in the OP there is a tool with which you can use some firmware roms in tgz format to flash over the fastboot state to get a "stock rom-ish" state back.
Once in the stock rom you have to go through the basic setup routine and then activate USB Debugging, then you can install TWRP, other Roms as per usual.

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