Oem update with unlocked bootloader - Huawei P20 Questions & Answers

Hi, is there any way to OEM update my Huawei P20 with an unlocked Bootloader? I don't want to reset my phone and lose all my apps and stuff. Now that EMUI 9 is coming soon, I need to know this. Plesse help me guys. I know there's some methods but they require factory reset. Thanks in advance!

Nvm hurupdater works fine and doesnt erase storage

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Relock Bootloader

Hey Guys,
Im going to trade in my G5 (h830) to one of my local shops after work today. I wanted to relock the bootloader but since i updated to 7.0 the OEM unlock option is grayed out and i forgot how to do it through adb since its been a while. could someone help me as to relocking it?
Please and thanks
none24 said:
Hey Guys,
Im going to trade in my G5 (h830) to one of my local shops after work today. I wanted to relock the bootloader but since i updated to 7.0 the OEM unlock option is grayed out and i forgot how to do it through adb since its been a while. could someone help me as to relocking it?
Please and thanks
Click to expand...
Click to collapse
make sure you phone is completely stock (stock recovery no root etc) and go to bootloader and type in fastboot oem lock

bootloader unlock FAILED - password wrong

Hello. I tried to unlock my bootloader on FRD-L19, Nougat 7.0, Emui 5.0 i got the unlockcode, but in adb i get alwas this:
fastboot oem unlock 4014054182370213
...
FAILED (remote: password wrong)
finished. total time: 0.008s
I have controlled every serial number etc. 5 times and used both IMEI-Numbers, everytime "passwort wrong" have i to go back to emui 4.1? or what can be the problem??
thank you
soulbreeder83 said:
Hello. I tried to unlock my bootloader on FRD-L19, Nougat 7.0, Emui 5.0 i got the unlockcode, but in adb i get alwas this:
fastboot oem unlock 4014054182370213
...
FAILED (remote: password wrong)
finished. total time: 0.008s
I have controlled every serial number etc. 5 times and used both IMEI-Numbers, everytime "passwort wrong" have i to go back to emui 4.1? or what can be the problem??
thank you
Click to expand...
Click to collapse
Is OEM unlocking turned on?
adriansticoid said:
Is OEM unlocking turned on?
Click to expand...
Click to collapse
yes! : )
soulbreeder83 said:
yes! : )
Click to expand...
Click to collapse
Then this must be a very serious problem since you said you already played with both IMEIs. I'm thinking...
Rommco05 said:
Check FRP in fastboot is locked or unlocked?
Click to expand...
Click to collapse
There stands:
PHONE Locked
FRP Unlock
What means that? I have unlocked the bootloader once of this device. Then he can be unlocked again, right?
Thank you
soulbreeder83 said:
There stands:
PHONE Locked
FRP Unlock
What means that? I have unlocked the bootloader once of this device. Then he can be unlocked again, right?
Thank you
Click to expand...
Click to collapse
PHONE Locked means your bootloader is locked.
Sent from my Honor 8 using XDA Labs
soulbreeder83 said:
There stands:
PHONE Locked
FRP Unlock
What means that? I have unlocked the bootloader once of this device. Then he can be unlocked again, right?
Thank you
Click to expand...
Click to collapse
Yes, your bootloader is locked.. try again via fastboot to unlock it.
You'll need the original key when you are trying it
the Command is something like "fastboot oem unlock *key*".
I know that. Have you seen my problem?? but, thank you anyway! I need to no why i get "wrong password" and what means "frp unlock".
Rommco05 said:
Check FRP in fastboot is locked or unlocked?
Click to expand...
Click to collapse
I tried it again. It doesn't work fu****g huawei...
I have taken 4 picures when i tried it. Can you find an issue? I don't think that i have made something wrong...
Thank you
I've had the same problem and it turned out that the first bootloader code i used ( with DC unlocker) is different from the one i got on the Huawei website.
So what i did eventually was to pay for the DC unlocker again.
I also downgraded back to MM, because i did not manually relock the bootloader before updating to N, which apparently locks the bootloader in a different way.
So I suggest dowgrading to MM and unlocking there plus relocking it before updating again,
IF you are sure you have the right / original bootloader code you used before,
or
use a 3rd party tool like DC unlocker to get the code.
You might have to downgrade to MM as well with this method . Not sure
Edit: Fyi, never post your IMEI online
Sent from my HUAWEI FRD-L09 using XDA Labs
Rommco05 said:
try via this tool https://forum.xda-developers.com/honor-8/development/tool-huawei-multi-tool-team-mt-t3523923
Click to expand...
Click to collapse
haha... maybe i am damn stupid, but i dont fint out, how to open this tool..?!? there are 34 files in the zip-folder, but no programm to open. i can open command window in this folder.. but its the standart window.. can you explain? maybe i should concat huawei, whats wrong and why i cant unlock my bootloader! and whats "frp unlock"?
oh maaan... don't have nerves for rooting this device... -.-
Thank you, for your help
soulbreeder83 said:
haha... maybe i am damn stupid, but i dont fint out, how to open this tool..?!? there are 34 files in the zip-folder, but no programm to open. i can open command window in this folder.. but its the standart window.. can you explain? maybe i should concat huawei, whats wrong and why i cant unlock my bootloader! and whats "frp unlock"?
oh maaan... don't have nerves for rooting this device... -.-
Thank you, for your help
Click to expand...
Click to collapse
It should either be an exe somewhere or just a bat file.
This tool does the same thing as a command window in the sense of unlocking the bootloader.
As far as I know it won't help with your problem.
Frp ( Factory reset protection) requires you to sign with your google account if enabled or you can't use the phone. ( Theoretically that is, I'm i noob myself so no idea)
But it was "locked" ( same as in your pics that is ) for me as well anf I didn't have a problem with it.
Sent from my HUAWEI FRD-L09 using XDA Labs
SharxX8 said:
It should either be an exe somewhere or just a bat file.
This tool does the same thing as a command window in the sense of unlocking the bootloader.
As far as I know it won't help with your problem.
Frp ( Factory reset protection) requires you to sign with your google account if enabled or you can't use the phone. ( Theoretically that is, I'm i noob myself so no idea)
But it was "locked" ( same as in your pics that is ) for me as well anf I didn't have a problem with it.
Sent from my HUAWEI FRD-L09 using XDA Labs
Click to expand...
Click to collapse
Safety is the enemy of freedom!! -.- Sounds very complicated! (sorry for my bad english). So, i was on android 6.1 and unlocked and rooted it. Than had my problems with root again (maybe the wrong supersu file, or something) Then i have downloaded update.app from hihonor and installed it from the external sd card and everything is working fine on my phone. but i can not unlock it. maybe i have the wrong software for my location ore something like that?
FRP unlock means "You have to unlock"? if its unlocked there will be "FRP unlocked"? i am right?
Maybe i should try the whole procedure from beginning. rollback, update etc.. and then try to unlock. or should i contact huawei?
Thank you and a nice evening *cheers* ^^
SharxX8 said:
I've had the same problem and it turned out that the first bootloader code i used ( with DC unlocker) is different from the one i got on the Huawei website.
So what i did eventually was to pay for the DC unlocker again.
I also downgraded back to MM, because i did not manually relock the bootloader before updating to N, which apparently locks the bootloader in a different way.
So I suggest dowgrading to MM and unlocking there plus relocking it before updating again,
IF you are sure you have the right / original bootloader code you used before,
or
use a 3rd party tool like DC unlocker to get the code.
You might have to downgrade to MM as well with this method . Not sure
Edit: Fyi, never post your IMEI online
Click to expand...
Click to collapse
Can just say that again :laugh:
That's all the advice I have. sorry
Sent from my HUAWEI FRD-L09 using XDA Labs
So finally after reading all posts , plz do downgrade to mm and try to unlock
I have the same trouble, I obtained my unlock key from huawei (I'm not going to give my imei to someone else), but I get wrong password.
How can I downgrade to MM? I'm on linux, so I cannot use that multitool (also, I prefer to make thing manually).
Thank you!
aleritty said:
I have the same trouble, I obtained my unlock key from huawei (I'm not going to give my imei to someone else), but I get wrong password.
How can I downgrade to MM? I'm on linux, so I cannot use that multitool (also, I prefer to make thing manually).
Thank you!
Click to expand...
Click to collapse
For downgrade you need a rollback package..
What is your model number and build number??
I have an honor FRD-L09 with build FRD-L09C432B394
I understood that I nned to rollback to emui 4.1 (android MM), then unlock, but after this step I cannot receive ota's so how can I return back to Nougat stock? And you have a trusted download for the needed packages?
I just want to use Titanium Backup to restore all my stuff... and some modifications (pixel launcher, magisk with some modules, viper audio, ad block, something this simple), nothing usually complex!
Thank you!
aleritty said:
I have an honor FRD-L09 with build FRD-L09C432B394
I understood that I nned to rollback to emui 4.1 (android MM), then unlock, but after this step I cannot receive ota's so how can I return back to Nougat stock? And you have a trusted download for the needed packages?
I just want to use Titanium Backup to restore all my stuff... and some modifications (pixel launcher, magisk with some modules, viper audio, ad block, something this simple), nothing usually complex!
Thank you!
Click to expand...
Click to collapse
For downgrade process you don't need to unlock bootloader..when you downgrade you will receive OTA updates..
To use TB you need root..which is required unlock bootloader..
Why you want to go back to MM BTW??
hassanjavaid8181 said:
For downgrade process you don't need to unlock bootloader..when you downgrade you will receive OTA updates..
To use TB you need root..which is required unlock bootloader..
Why you want to go back to MM BTW??
Click to expand...
Click to collapse
I don't want to go back to MM, but as long as I understood this is a needed step to unlock my bootloader.
I experienced the same trouble of the thread creator: the password that huawei gave me is invalid.
SharxX8 said:
I also downgraded back to MM, because i did not manually relock the bootloader before updating to N, which apparently locks the bootloader in a different way.
So I suggest dowgrading to MM and unlocking there
Click to expand...
Click to collapse
My target is to stay at android nougat, with root (magisk if possible).
But with nougat I cannot unlock my bootloader...

how to get mate 9 pro LON-L29C185B180 bootloader LOCKED

hi dear friends
thanks for all who support members
I have mate 9 pro
LON-L29C185B180
when get stock recovery enter erecovery the I used dc phoneix to fix it by stock firmware cost 15€
after this my device fully unrooted frp lock stock recovery but bootloader relock how can I change it to lock please I need your support
.
i try to used dc-unlocker for this steps but the choice not available like thier description like com port and some drivers
see the post for steps
How to lock Huawei bootloader (from RELOCKED to LOCKED)
please help
thanks again to all
You could've done it for free. Anyway. Update using Firmware finder to B180 or use the flash update thread in guides, updating will lock bootloader.
dear ante0 thanks for replay, I will be fine if pay I used dc phoneix to right update.app but not lock. I found thread to flash firmware but only for chinese devices can you please help by llink for this guide?
You could've done it for free. Anyway. Update using Firmware finder to B180 or use the flash update thread in guides, updating will lock bootloader.
Click to expand...
Click to collapse
Dear ante0
thanks a lot
I used firmware finder and it was difficult to use in the beginning to setup settings. after that every things going smoothly. now the bootloader is locked
Dear ante0
thanks a lot
I used firmware finder and it was difficult to use in the beginning to setup settings. after that every things going smoothly. now the bootloader is locked.
after flash fully firmware bootloader become locked and device boot was very fast not like before
You can use Mate_8_rayglobe_knife for relocked to locke again.
Thanks my friend already done

How to Relock bootloader

Hello all.
I attempted to flash a ROM a while back and failed miserably. All I managed to do in the end was unlock the bootloader. I would like to change this, and set things back to they way they were; locked bootloader.
Is there anyway to achieve this? I would like to be able to use apps like Uber that won't work with an unlocked bootloader.
Any and all help is greatly appreciated.
cr33p3r1n1134 said:
Hello all.
I attempted to flash a ROM a while back and failed miserably. All I managed to do in the end was unlock the bootloader. I would like to change this, and set things back to they way they were; locked bootloader.
Is there anyway to achieve this? I would like to be able to use apps like Uber that won't work with an unlocked bootloader.
Any and all help is greatly appreciated.
Click to expand...
Click to collapse
Hello I think this could help you
https://youtu.be/8OywEYZ2cbw
This is a video about how to rebrand your mate 9
Now it in the steps it says that after you use the options 2 to rebrand it relock your bootloader, I don't know what mate you have but since you probably installed a custom recovery it is why you can't relock with the command, so my suggestion is this download the WHOTA update and also install the the software finder via Google Play. With it look for your specific model and copy the links to download the files for your specific model in your PC, Also do a Backup of your Oeminfo via the TWRP since it will be the only file you won't find, probably (if it happens to be the MHA-L09 C605 send it to me I need it for my phone I made the mistake of not backing up my Oeminfo).
If you download the files and follow the instructions of the video you will be able to relock your bootloader. But watch it 3 times and also download all the files and make sure to back up everything in your PC if something goes wrong.
Sent from my MHA-L09 using Tapatalk
just flash your oeminfo.bin file again and your bootloader will be locked.. make sure its for your model!
gremy1987 said:
Hello I think this could help you
https://youtu.be/8OywEYZ2cbw
This is a video about how to rebrand your mate 9
Now it in the steps it says that after you use the options 2 to rebrand it relock your bootloader, I don't know what mate you have but since you probably installed a custom recovery it is why you can't relock with the command, so my suggestion is this download the WHOTA update and also install the the software finder via Google Play. With it look for your specific model and copy the links to download the files for your specific model in your PC, Also do a Backup of your Oeminfo via the TWRP since it will be the only file you won't find, probably (if it happens to be the MHA-L09 C605 send it to me I need it for my phone I made the mistake of not backing up my Oeminfo).
If you download the files and follow the instructions of the video you will be able to relock your bootloader. But watch it 3 times and also download all the files and make sure to back up everything in your PC if something goes wrong.
Sent from my MHA-L09 using Tapatalk
Click to expand...
Click to collapse
redhotneo said:
just flash your oeminfo.bin file again and your bootloader will be locked.. make sure its for your model!
Click to expand...
Click to collapse
Thanks guys. I've found a fairly simple solution.
This is the solution that worked for me.
1. Type "fastboot oem relock (your phone's unlock code)" and select unlock or yes with volume buttons & power.
Hopefully this method will help others.
How we do now that there is no more huawei unlock website ? thank you
mrpurple66 said:
How we do now that there is no more huawei unlock website ? thank you
Click to expand...
Click to collapse
hi did you managed to find a way to "unlock" the bootloader w/o the codes?
Only possible with funky huawei an downgrade to android 7
Google for unlock funky huawei. But you have to pay money for this
Huawei stoped every possibilities so only with funky
virtuell_gitarrist said:
Only possible with funky huawei an downgrade to android 7
Google for unlock funky huawei. But you have to pay money for this
Huawei stoped every possibilities so only with funky
Click to expand...
Click to collapse
Hcu-client (A tool by DC unlocker) worked fine last I tested it, was on MHA-L29C432B373
Just flash ur oeminfo.bin file to re lock ur boot loader.. Its that easy. But u lose all ur files cos phone resets

Relocking bootloader, stock OOS android 10

Hey, i have android 10 stable installed in my phone. Just before i updated my phone (while i still was on 9.0.9), i also unlocked my bootloader, nothing else, no twrp or root. Now i would like to relock my phone again, because google pay is not working anymore, and im not willing to root my phone, because updating problems all the time etc. so can i relock my bootloader just by using command "fastboot oem lock" on fastboot mode? or do i have to do something else before that? also, is there possibility to brick phone somehow? if so, is there a way to fix it, while using OOS with android 10? i know this is stupid question but i hope someone could anwer it. Its not first time, when something is changed due new android update, and all previous guides are wrong.. =/
only reason i unlocked my phone, was that when i had oneplus 1, it bricked somehow oneday, and only way to get it back working, was empying whole phone, but there was possibility to recover data, if bootloader is unlocked, but i didnt have that, so i lost everything.. so i unlocked this one, to prevent that problem, but now i have new, because Android Pay is not working..
I think you can use "Fastboot oem lock" as always, but it will wipe all your data (It's no way to skip that). I think it won't brick your phone
Yes, it won't brick your phone, just wipe your data.
Relocking succeed, thank you..

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