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P20 pro unable to flash recovery

Hello,
I have a P20 Pro with unlocked bootloader, i decided to updated the phone trought OTA by flashing original recovery and instal OTA of Android 10.
After that i wanted to get back to TWRP then root my phone, but i get surprised that the phone bootloader get locked again after update.
I need to unlock my bootloader again in order to use my phone. the command in fastboot : fastboot oem unlock **************** (i put my old unlocking code which already worked 2 years ago)
but i get as a result :
...
FAILED (remote: invalid command)
finished. total time : 0.027s
can anyone help me getting back my bootloader unlocked and twrp installed please ? i dont want loose my phone
NB : i confirm again that my code was working before on android 9 and had bootloader unlocked

Rovyo said:
Hello,
I have a P20 Pro with unlocked bootloader, i decided to updated the phone trought OTA by flashing original recovery and instal OTA of Android 10.
After that i wanted to get back to TWRP then root my phone, but i get surprised that the phone bootloader get locked again after update.
I need to unlock my bootloader again in order to use my phone. the command in fastboot : fastboot oem unlock **************** (i put my old unlocking code which already worked 2 years ago)
but i get as a result :
...
FAILED (remote: invalid command)
finished. total time : 0.027s
can anyone help me getting back my bootloader unlocked and twrp installed please ? i dont want loose my phone
NB : i confirm again that my code was working before on android 9 and had bootloader unlocked
Click to expand...
Click to collapse
You idiot EMUI 10 cannot be bootloader unlocked, downgrade to EMUI 9.0!!!
If you want android 10 or even 11 you need something called a GSI, which I can inform you about it.

jjgvv said:
You idiot EMUI 10 cannot be bootloader unlocked, downgrade to EMUI 9.0!!!
If you want android 10 or even 11 you need something called a GSI, which I can inform you about it.
Click to expand...
Click to collapse
i'm really an idiot i can confirm that, how to downgrade please ? my bootloader in locked right now

Rovyo said:
i'm really an idiot i can confirm that, how to downgrade please ? my bootloader in locked right now
Click to expand...
Click to collapse
HISUITE

jjgvv said:
HISUITE
Click to expand...
Click to collapse
You saved me mate, was really a dumb move to go thought OTA without checking this point. Didn't now Huawei become that ******
Any advice for a good custom rom based on android 10 ?
And thanks again for your precious help

Rovyo said:
You saved me mate, was really a dumb move to go thought OTA without checking this point. Didn't now Huawei become that ******
Any advice for a good custom rom based on android 10 ?
And thanks again for your precious help
Click to expand...
Click to collapse
I can get you Android 11 actually, though there are a few bugs on both 10 and 11.

jjgvv said:
I can get you Android 11 actually
Click to expand...
Click to collapse
even better if it is android 11, i will try it
also have another dumb question : if i install TWRP on the EMUI 9.1 with unlocked bootloader, can i flash the emui 10 rom thought TWRP ? or this will brick the phone ?

Rovyo said:
even better if it is android 11, i will try it
also have another dumb question : if i install TWRP on the EMUI 9.1 with unlocked bootloader, can i flash the emui 10 rom thought TWRP ? or this will brick the phone ?
Click to expand...
Click to collapse
Yes, system will be 'destroyed', as you modded the recovery.

jjgvv said:
Yes, system will be 'destroyed', as you modded the recovery.
Click to expand...
Click to collapse
that what i was thinking also, so bye Emui 10 for ever i guess.
what was the rom base on android 11 you are referring to ?

GSI Project treble rom.
The definition is https://source.android.com/setup/bu...tem image (GSI,or higher can run successfully.
Google's Offical GSI will not boot on huaweis though.
After unlock bootloader download this https://github.com/phhusson/treble_...v300.l/system-roar-arm64-aonly-vanilla.img.xz
use 7zip(https://www.7-zip.org/a/7z1900-x64.exe) to extract the file once and rename it to system.img and move to C drive WITHOUT under any folders.
Then go to recovery and factory reset, do not advance wipe, wipe>factory reset only
Then go to fastboot and
fastboot flash system C:\system.img
Failing to follow will result in rage!

Backup System, Vendor, Data and Internal storage in TWRP before doing anything will be a wise choice, in case anything is wrong.

Forgot to mention you must flash magisk in TWRP before installing rom, to disable AVB(Android Vertified Boot) so that a custom rom can be loaded.

jjgvv said:
Backup System, Vendor, Data and Internal storage in TWRP before doing anything will be a wise choice, in case anything is wrong.
Click to expand...
Click to collapse
Yeah for sur, i'm rolling back, unlocking BL then TWRP in order to get a full backup. I ll check the rom after that
A senior member refer to for EMUI 10 upgrading :
"Don't update system via OTA when phone is rooted or bootloader unlock. Flash firmware via erecovery and rooted again"
i think this is incorrect right ? he cant root again while on EMUI 10 ?

jjgvv said:
Forgot to mention you must flash magisk in TWRP before installing rom, to disable AVB(Android Vertified Boot) so that a custom rom can be loaded.
Click to expand...
Click to collapse
thanks for the proper advice

Rovyo said:
Yeah for sur, i'm rolling back, unlocking BL then TWRP in order to get a full backup. I ll check the rom after that
A senior member refer to for EMUI 10 upgrading :
"Don't update system via OTA when phone is rooted or bootloader unlock. Flash firmware via erecovery and rooted again"
i think this is incorrect right ? he cant root again while on EMUI 10 ?
Click to expand...
Click to collapse
https://github.com/SkyEmie/huawei-honor-unlock-bootloader
Read troubleshooting part, EMUI 10 cannot unlock bootloader

jjgvv said:
https://github.com/SkyEmie/huawei-honor-unlock-bootloader
Read troubleshooting part, EMUI 10 cannot unlock bootloader
Click to expand...
Click to collapse
the lasted TWRP release cant decrypt the data, trying to find a working one and the phone don't want to boot to recovery anymore even with volume up + power bouton or via command adb reboot recovery. seems a good day hahaha

Still boots fastboot? Otherwise you are screwed

jjgvv said:
Still boots fastboot? Otherwise you are screwed
Click to expand...
Click to collapse
what do you mean ? yes i still can go on fastboot and already rolled back to Emui 9.1
just want to boot on damn recovery hahaha and if it can decrypt daba will be great

jjgvv said:
Still boots fastboot? Otherwise you are screwed
Click to expand...
Click to collapse
well i'm stuck with twrp not decrypting my data
i managed to install TWRP (several version), boot on them and so nothing to do
also can get root easily and magisk as i sideload zip from crypted TWRP version (worked)
tried the version twrp_clt_0.1.img from XDA stuck on TWRP starting screen
i'm almost giving up

Extract Android 11 Gsi, rename to system.img and move to C drive , not under any folders.
Go to fastboot then
Fastboot erase data
Fastboot erase cache
Fastboot flash system C:\system.img

Question downgrade to android 11 from 12

does lineage as provided by electimon only work on android 11?
how does one downgrade to android 12?
i believe the preflash validation errors that i see are related to trying to replace the bootloader with an older one.
Does this mean the device is locked on android 12 and can not revert?

The lineage rom does not replace the bootloader, you can revert with lenovo smart assistant recovery mode, and stock is android 11

install TWRP in oneplus 8

I want to root my oneplus 8. install TWRP recovery.
please anyone help me how to install TWRP in oneplus 8
I am using oxygen OS 11
Android version 11

Use fastboot to flash the TWRP image to recovery using the following command:
Code:
fastboot flash recovery [name of image].img
Keep in mind that this command will flash to your primary slot; if you'd like to flash it to both, replace "recovery" with "recovery_a" or "recovery_b", which are the names of the two partitions. Your bootloader also must be unlocked for this operation to work.
The link for the TWRP image can be found on XDA.

Xryphon said:
Use fastboot to flash the TWRP image to recovery using the following command:
Code:
fastboot flash recovery [name of image].img
Keep in mind that this command will flash to your primary slot; if you'd like to flash it to both, replace "recovery" with "recovery_a" or "recovery_b", which are the names of the two partitions. Your bootloader also must be unlocked for this operation to work.
The link for the TWRP image can be found on XDA.
Click to expand...
Click to collapse
my device running oxygen OS 11
already received an OTA update Android 12
this TWRP custom recovery for 11 or 12?
it work both 11 or 12?
Or only 11?
thanks

jayed_Sk said:
my device running oxygen OS 11
already received an OTA update Android 12
this TWRP custom recovery for 11 or 12?
it work both 11 or 12?
Or only 11?
thanks
Click to expand...
Click to collapse
TWRP only works on Android 11. Not 12.
Android 12 can be rooted, its just a lengthier process

FoxyDrew said:
TWRP only works on Android 11. Not 12.
Android 12 can be rooted, its just a lengthier process
Click to expand...
Click to collapse
for installing TWRP recovery
need bootloader unlock or not?

I am successfully instal TWRP on my oneplus 8 thanks everyone

jayed_Sk said:
I am successfully instal TWRP on my oneplus 8 thanks everyone
Click to expand...
Click to collapse
Hey how u unlock ur bootloader?

Swatyoyo said:
Hey how u unlock ur bootloader?
Click to expand...
Click to collapse
fastboot oem unlock

HI bois. Ive flashed twrp on _a and _b with android 12 now i have a bricked phone is there a way to unbrick it ?
Ive tried EDL mode but its not working. I have MSM and installed Qualcomm drivers but MSM not seeing my phone and the screen is not flashing when i hold volume combo and plug in cables. Any ideas ?

saiiint said:
HI bois. Ive flashed twrp on _a and _b with android 12 now i have a bricked phone is there a way to unbrick it ?
Ive tried EDL mode but its not working. I have MSM and installed Qualcomm drivers but MSM not seeing my phone and the screen is not flashing when i hold volume combo and plug in cables. Any ideas ?
Click to expand...
Click to collapse
MSM is the only way to unbrick, try reinstalling all drivers in test mode and when driver signature is off

Is it still not possible to TWRP android 12? (Android 12 Update 5. August 2022)

jayed_Sk said:
I am successfully instal TWRP on my oneplus 8 thanks everyone
Click to expand...
Click to collapse
what did you end up doing to get twrp on it? i have the t-mobile version on android 12 with unlocked bootloader, but haven't found proper way to install twrp

FoxyDrew said:
TWRP only works on Android 11. Not 12.
Android 12 can be rooted, its just a lengthier process
Click to expand...
Click to collapse
i have an unlocked bootloader on oneplus 8 t-mobile on android 12 mind pointing me in the direction to root it.

PBoltas said:
what did you end up doing to get twrp on it? i have the t-mobile version on android 12 with unlocked bootloader, but haven't found proper way to install twrp
Click to expand...
Click to collapse
I did this on android 11. I don't know how to do it in Android 12

PBoltas said:
i have an unlocked bootloader on oneplus 8 t-mobile on android 12 mind pointing me in the direction to root it.
Click to expand...
Click to collapse
Is your bootloader unlocked?

FoxyDrew said:
yes, and also I figured it out.
all I did was downgrade the os version back to android 11 using msm download tool. like I was fixing a bricked phone. so I can install twrp and root it with no problems
Click to expand...
Click to collapse

jayed_Sk said:
I did this on android 11. I don't know how to do it in Android 12
no worries I downgraded to 11
Click to expand...
Click to collapse

Hello!
I build Orangefox for the Oneplus 8t and 9r and I am now doing a unified build which will work
on Oneplus 8, 8t, 8 Pro, and 9r.
A new updated unified beta Version is here
Decryption might not work for Oneplus 8 and 8Pro yet but I will try to fix that in the next days!

Wishmasterflo said:
Hello!
I build Orangefox for the Oneplus 8t and 9r and I am now doing a unified build which will work
on Oneplus 8, 8t, 8 Pro, and 9r.
A new updated unified beta Version is here
Decryption might not work for Oneplus 8 and 8Pro yet but I will try to fix that in the next days!
Click to expand...
Click to collapse
SWEET! will you be able to post a thread for OnePlus 8 xda? either way awesome job bro! cant wait to try this in the near future.

thattechguy_69 said:
SWEET! will you be able to post a thread for OnePlus 8 xda? either way awesome job bro! cant wait to try this in the near future.
Click to expand...
Click to collapse
Yes will do that as soon as I have added working decryption for Oneplus 8 and 8 Pro.
Actually decryption should already work for all OP8 series unified ROMs like Pixel Blaster and FlamingoOS which are unified for OP8 series and Op9r und using FbeV2 decryption method.

Question How do I unlock my bootloader on my oneplus 9 LE2115

Hi... I want to unlock my oneplus 9 bootloader so I can install the pixen os but I don't see any guide here to do this.

I literally just sent you those links here. https://forum.xda-developers.com/t/unlock-bootloader-oneplus-9-global-na.4448653/post-86929439
Stop flooding the forum with requests, this isn't a very high traffic place.

Saw your post and your answer wasn't clear... do I need to downgrade to unlock bootloader or do I need to downgrade to be able to install custom roms.
EtherealRemnant said:
I literally just sent you those links here. https://forum.xda-developers.com/t/unlock-bootloader-oneplus-9-global-na.4448653/post-86929439
Stop flooding the forum with requests, this isn't a very high traffic place.
Click to expand...
Click to collapse

ericsimons18 said:
Saw your post and your answer wasn't clear... do I need to downgrade to unlock bootloader or do I need to downgrade to be able to install custom roms.
Click to expand...
Click to collapse
You have to downgrade to be able to use custom ROMs. The ROMs require Android 11 because apparently OnePlus posted incomplete/unusable sources for Android 12.
I don't know if the downgrade package re-locks the bootloader so I would just unlock the bootloader after you're back on OOS11. I had issues trying to unlock the bootloader after doing the OTA to the latest OOS11 so I personally would do it in this order:
1) downgrade to OOS11
2) unlock bootloader
3) OTA to latest OOS11
4) flash custom ROM

This still doesn't work for me. I have downgraded to A11 and still get the error "FAILED (remote: 'Command not supported in default implementation')" The device shows up when I type fastboot devices but continues to return this error when attempting fastboot oem unlock. How do I fix this?

Boot into OOS 11, unlock Developer Options, and switch "OEM unlocking" on. Only then can you unlock your bootloader.
You can also search "oneplus 9 unlock bootloader" on Google.

Can't unlock bootloader after OTA A12 Europe region

Hi,
I installed the most recent OTA for the GM1913 : OnePlus7ProOxygen 21.E.30 OTA 4300 all 2210120522.zip. After my installation locked my bootloader, i restarted my phone in bootloader mode and used the command fastboot oem unlock, which I had previously tested to work on Android 11, but it failed on Android A12.
FAILED (remote: Device cannot be unlocked for technical reason.)
Click to expand...
Click to collapse
finished. total time: 0.016s
Click to expand...
Click to collapse
Anyone with information on this problem?

yassine2217 said:
Hi,
I installed the most recent OTA for the GM1913 : OnePlus7ProOxygen 21.E.30 OTA 4300 all 2210120522.zip. After my installation locked my bootloader, i restarted my phone in bootloader mode and used the command fastboot oem unlock, which I had previously tested to work on Android 11, but it failed on Android A12.
Anyone with information on this problem?
Click to expand...
Click to collapse
have the same problem,i tried with oem unlock and flashing unlock but none of them worked.

yassine2217 said:
Hi,
I installed the most recent OTA for the GM1913 : OnePlus7ProOxygen 21.E.30 OTA 4300 all 2210120522.zip. After my installation locked my bootloader, i restarted my phone in bootloader mode and used the command fastboot oem unlock, which I had previously tested to work on Android 11, but it failed on Android A12.
Anyone with information on this problem?
Click to expand...
Click to collapse
You can unlock the bootloader only on A11, on A12 it is impossible. You need to go to A11, unlock bl and then go to A12.

Rein0ud said:
You can unlock the bootloader only on A11, on A12 it is impossible. You need to go to A11, unlock bl and then go to A12.
Click to expand...
Click to collapse
how can i keep the bootloader unlock before update to A12 ? i mean what is the step to update to A12 ? thx

yassine2217 said:
how can i keep the bootloader unlock before update to A12 ? i mean what is the step to update to A12 ? thx
Click to expand...
Click to collapse
This is done using MSM Tools, see this topic to downgrade:
[OP7PRO][LATEST OOS 11.0.5.1 GM21AA/GM21BA] Collection of unbrick tools
Disclaimer: By attempting any of the processes listed in this thread you accept full responsibility for your actions. I will not be held responsible if your device stops working, catches fire, or turns into a hipster and claims to have been...
forum.xda-developers.com
After downgrading, unlock bootloader and then flash OOS A12 from zip in system update. As far as I know, this method helps people from my forum

Rein0ud said:
This is done using MSM Tools, see this topic to downgrade:
[OP7PRO][LATEST OOS 11.0.5.1 GM21AA/GM21BA] Collection of unbrick tools
Disclaimer: By attempting any of the processes listed in this thread you accept full responsibility for your actions. I will not be held responsible if your device stops working, catches fire, or turns into a hipster and claims to have been...
forum.xda-developers.com
After downgrading, unlock bootloader and then flash OOS A12 from zip in system update. As far as I know, this method helps people from my forum
Click to expand...
Click to collapse
Thank you

is it worked ?
Thank you.

khalisz said:
is it worked ?
Thank you.
Click to expand...
Click to collapse
yes it worked bro