Going back to stock and relock bootloader - OnePlus 8T Questions & Answers

Hi guys, I rooted my op8t but I haven't installed custom recovery yet. I wanted to use cyberpunk modules(my phone version is KB2001 INDIA 12GB 256GB). After installing it I felt some flaws and I was thinking of flashing it over my secondary phone(Le max2) and keeping op8T as stock as possible. When I asked about this issue to my friends, they suggested not to relock the bootloader as it will corrupt the persist.img and I will loose the fingerprint unlock. Is there any way I can revert to full stock with bootloader locked without any problems?

Use the MSM tool. It'll convert it to stick and relock the bootloader. I have the US TMobile version and I have unlocked and relocked (when reverting to stock using MSM tool) ans I did not have any issues with fingerprint or any other issues.

androidbuff123 said:
Use the MSM tool. It'll convert it to stick and relock the bootloader. I have the US TMobile version and I have unlocked and relocked (when reverting to stock using MSM tool) ans I did not have any issues with fingerprint or any other issues.
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I heard it will give problem to persist file resulting in fp scanner failure. I can understand what you are saying. I am bit worried as I installed some modules on magisk. Will it be ok?.
Also, I'm believing in you. Can u please tell me the procedure on how to do so

Related

need help and information please

hello everyone i want to ask if i can relock the bootloader after changing my poco x3 nfc rom from turkish to global rom
unlock bootloader then i flash the global rom
can i now type in faceboot fastboot oem lock
or it will damage my phone
AmirHRC said:
hello everyone i want to ask if i can relock the bootloader after changing my poco x3 nfc rom from turkish to global rom
unlock bootloader then i flash the global rom
can i now type in faceboot fastboot oem lock
or it will damage my phone
Click to expand...
Click to collapse
I have already answered this question in this thread. Read it carefully and be sure to use the Turkish MIUI variant. Basically your original MIUI version and variant to avoid a possible hard-brick.
Slim K said:
I have already answered this question in this thread. Read it carefully and be sure to use the Turkish MIUI variant. Basically your original MIUI version and variant to avoid a possible hard-brick.
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you didn't understand me well
i want to change my turkish rom miui12.0.5
to global rom miui 12.0.7
and if i do that can i relock the bootloader
AmirHRC said:
you didn't understand me well
i want to change my turkish rom miui12.0.5
to global rom miui 12.0.7
and if i do that can i relock the bootloader
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Click to collapse
Probably not. I don't know anyone who tried that and succeeded. The thing is, in an unlocked state, the Bootloader (HLOS to be exact) will ignore all errors that are related to custom firmware. Once locked again, you run the risk of a fatal error and will be transferred to EDL mode, which you can't get out from without a Xiaomi verified account (essentially hardbricking your device).
Tell you what, try doing this the opposite way. Lock the bootloader with the turkish 12.0.5.0 fastboot MIUI first, then try to flash the global version 12.0.7.0 through fastboot or recovery and see what happens. That way you don't risk a hardbrick (avoiding repair shop costs), you can always unlock again anyways.
Slim K said:
Probably not. I don't know anyone who tried that and succeeded. The thing is, in an unlocked state, the Bootloader (HLOS to be exact) will ignore all errors that are related to custom firmware. Once locked again, you run the risk of a fatal error and will be transferred to EDL mode, which you can't get out from without a Xiaomi verified account (essentially hardbricking your device).
Tell you what, try doing this the opposite way. Lock the bootloader with the turkish 12.0.5.0 fastboot MIUI first, then try to flash the global version 12.0.7.0 through fastboot or recovery and see what happens. That way you don't risk a hardbrick (avoiding repair shop costs), you can always unlock again anyways.
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my phone is new and is already on turkish miui 12.0.5 with locked bootloader
i want to unlock bootloader and flash the global rom than relock it
it will work or no
AmirHRC said:
my phone is new and is already on turkish miui 12.0.5 with locked bootloader
i want to unlock bootloader and flash the global rom than relock it
it will work or no
Click to expand...
Click to collapse
As i've replied before i personally don't know and have not known a case where it succeeded. Why are you afraid of trying? Most will not help you with something if you don't try it yourself first, try it with your bootloader locked as is and if it doesn't work forget about unlocking and locking again.
Slim K said:
As i've replied before i personally don't know and have not known a case where it succeeded. Why are you afraid of trying? Most will not help you with something if you don't try it yourself first, try it with your bootloader locked as is and if it doesn't work forget about unlocking and locking again.
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I will try yes but you cant use any flash method without unlocking bootloader it's known
AmirHRC said:
I will try yes but you cant use any flash method without unlocking bootloader it's known
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I don't know if this will work or not. Try going to updater app and pressing download latest release. Then stop it and open internal storage. There should be a folder called downloaded_rom or something similar. Try placing the global rom recovery version there, delete the one that is there and see what happens. Maybe you can toggle update now or flash through MIUI recovery.
If does not work, then i can't help you further. Maybe others who have tried it can.

Question Relocking Bootloader via Mi Tools

Greetings Poco users, I just decided to relock my bootloader, but from my experience, on my last Redmi 7 when I did it, my phone turned to "Lock Mode" and after all I had to unlock it again. Is it completely alright, or you have any idea how I can do it?
Thank you in advance.
KlimoCZ said:
Greetings Poco users, I just decided to relock my bootloader, but from my experience, on my last Redmi 7 when I did it, my phone turned to "Lock Mode" and after all I had to unlock it again. Is it completely alright, or you have any idea how I can do it?
Thank you in advance.
Click to expand...
Click to collapse
https://forum.xda-developers.com/t/flash-tool-guide-use-xiaomi-flash-tool.4262425/
I mean you can re-lock without worry as long as you are running the stock OS and configs. If you try the same while running a custom ROM it would just hard brick your device. As suggested by the user above, Mi Flash Tool (the one you use to flash fastboot ROM's) has an option to lock the bootloader as well, very simple process.
Naveenthemi said:
I mean you can re-lock without worry as long as you are running the stock OS and configs. If you try the same while running a custom ROM it would just hard brick your device. As suggested by the user above, Xiaomi Flash Tool (the one you used to unlock the bootloader) has an option to lock the bootloader as well, very simple process.
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Click to collapse
Xiaomi flash tool and Miflash unlock are two different software.
When you relock the bootloader with Miflash tool you flash a rom and relock.
Miflash unlock as its name suggests is only used for unlocking.
You can use Mi Flash tool with any Miui rom by relocking or not.
obviously does not work with an AOSP rom.
NOSS8 said:
Xiaomi flash tool and Miflash unlock are two different software.
When you relock the bootloader with Miflash tool you flash a rom and relock.
Miflash unlock as its name suggests is only used for unlocking.
You can use Mi Flash tool with any Miui rom by relocking or not.
obviously does not work with an AOSP rom.
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My bad, messed the names up.
Thank you, I will try it when they release new build for EU version which is my stock ROM.

Would it be possible to re-lock the bootloader if I changed the rom and recovery

I've been thinking of unlocking the bootloader and changing the rom to Pixel experience. If I eventually decide to revert back to OOS would it be possible to also re-lock the bootloader?
Yes. You can do that via cmd or use the restore tool here: https://forum.xda-developers.com/t/...l-to-restore-your-device-to-oxygenos.4148415/
Be warned, do not try to relock bootloader untill you are full stock because you might brick the phone and be forced to use the tool i linked above ( i did it once )
a-regular-pear said:
I've been thinking of unlocking the bootloader and changing the rom to Pixel experience. If I eventually decide to revert back to OOS would it be possible to also re-lock the bootloader?
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I re locked the bootloader when I was on Pixel Experience Rom A11 using avb_custom key .img file. It was optional but I still did it successfully. However, I have not tried to lock bootloader on custom ROM since the 12 ROMs came as it is not mentioned anywhere so it might brick the device. If you want to re lock the BL then you'll have to go back to stock OOS. Try using the unbrick or MSM tool for OP Nord (Specific model/region).

oneplus 8t unroot + get back to stock

Hi,
I am currently on A11 with Oneplus 8T and unlocked bootloader + rooted stock rom.
What is the proper process to lock the bootloader and to get back the stock rom? What are the options?
Can I just factory reset the device?
Thanks,
2019registered said:
Hi,
I am currently on A11 with Oneplus 8T and unlocked bootloader + rooted stock rom.
What is the proper process to unlock the bootloader and to get back the stock rom? What are the options?
Can I just factory reset the device?
Thanks,
Click to expand...
Click to collapse
You're confusing us
You're already unlock+root
Then again ask for unlock BL!
If you want just stock then flash boot from stock that's it nothing else to do
@Mr Hassan sorry, I have just edited the first post. I want to LOCK the bootloader and get fully back to an unrooted stock rom.
2019registered said:
@Mr Hassan sorry, I have just edited the first post. I want to LOCK the bootloader and get fully back to an unrooted stock rom.
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That's simple just flash stock rom or boot and relock it
2019registered said:
@Mr Hassan sorry, I have just edited the first post. I want to LOCK the bootloader and get fully back to an unrooted stock rom.
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Install the latest rom for your phone from the OnePlus support site using local install. That will overwrite the Magisk patched boot you currently have installed.
After the phone reboots (you'll see that Magisk shows it's not installed) then boot into bootloader and use fastboot oem lock
Then select NO (yes, this is a bug in the OOS bootloader) and that should wipe your phone and bring it up with the bootloader locked.
if you want the easiest fastest way, just use the msm tool for the correct model.
ps. if you dont care about losing your data

Will I get a brick if I lock bootloader with an old stock ROM?

I want to relock bootloader, but will I get brick if I lock bootloader with old stock ROM installed on device?
Look inside here:
Lock BootLoader after Rooting?
Thanks for taking time to read my query. I was wondering if I've to lock boot-loader after rooting ( I just rooted my Oero) and before looking can I take everything backup on titanium backup and then restore everything after locking ? I'm I...
forum.xda-developers.com
jwoegerbauer said:
Look inside here:
Lock BootLoader after Rooting?
Thanks for taking time to read my query. I was wondering if I've to lock boot-loader after rooting ( I just rooted my Oero) and before looking can I take everything backup on titanium backup and then restore everything after locking ? I'm I...
forum.xda-developers.com
Click to expand...
Click to collapse
I know that if I install modified ROM and lock bootloader I will get a brick. But will I get a brick if i install official (stock) ROM but old version and then lock bootloader? For example, I installed stock ROM (not modified) with Android 10, but the latest is Android 11 then I locked bootloader. Will I get a brick?
jwoegerbauer said:
Look inside here:
Lock BootLoader after Rooting?
Thanks for taking time to read my query. I was wondering if I've to lock boot-loader after rooting ( I just rooted my Oero) and before looking can I take everything backup on titanium backup and then restore everything after locking ? I'm I...
forum.xda-developers.com
Click to expand...
Click to collapse
The question is, can I lock the bootloader with the old version of the official firmware installed without getting a brick. Because the old version of the firmware works smoother.
Locking a bootloader doesn't affect ROM actually installed: Lock or Unlock will wipe your data, that's all.
jwoegerbauer said:
Locking a bootloader doesn't affect ROM actually installed: Lock or Unlock will wipe your data, that's all.
Click to expand...
Click to collapse
So can I install old version of fw? I heard something about rollback protection.
Oybek78 said:
So can I install old version of fw? I heard something about rollback protection.
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Click to collapse
You still, or I didn´t find, that you mention the model of your device, that´s matter to have the right answer.
Also, it depends on which method you used to flash the ROM, if you officially, flashed the ROM, and the rollback didn´t affect your device, then it won´t do, locking or unlocking it.
Oybek78 said:
So can I install old version of fw? I heard something about rollback protection.
Click to expand...
Click to collapse
The stock ROM can be installed on the phone at any time. Mostly via ADB / Fastboot tools.
SubwayChamp said:
You still, or I didn´t find, that you mention the model of your device, that´s matter to have the right answer.
Also, it depends on which method you used to flash the ROM, if you officially, flashed the ROM, and the rollback didn´t affect your device, then it won´t do, locking or unlocking it.
Click to expand...
Click to collapse
My phone is Sony Xperia 1 J9110. I flashed it officially to the latest ROM through settings. Then I unlocked the bootloader and flashed the old stock ROM via newflasher. Then I decided to relock the bootloader with old stock ROM installed. Does this mean that I will get my phone bricked if I lock the bootloader with old stock ROM actually installed?
jwoegerbauer said:
The stock ROM can be installed on the phone at any time. Mostly via ADB / Fastboot tools.
Click to expand...
Click to collapse
But can I lock the bootloader with old stock ROM installed?
I saw somewhere that if you lock the bootloader with the old firmware version, you may get brick. But I'm not sure about that.
Why steadily repeat your posts?
FYI: I hereby opt out of this thread.
jwoegerbauer said:
Why steadily repeat your posts?
FYI: I hereby opt out of this thread.
Click to expand...
Click to collapse
Because you answered me
Oybek78 said:
My phone is Sony Xperia 1 J9110. I flashed it officially to the latest ROM through settings. Then I unlocked the bootloader and flashed the old stock ROM via newflasher. Then I decided to relock the bootloader with old stock ROM installed. Does this mean that I will get my phone bricked if I lock the bootloader with old stock ROM actually installed?
Click to expand...
Click to collapse
Yes, always that you flash a stock ROM, you can re-lock it, fastboot will erase the data as a security measurement.

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