Database Develop

[Q]Stuff to do before unlocking bootloader/root

So I just got My OnePlus 3T and like most, would like it rooted! I have had experience with rooting and unlocking bootloader, but since My earlier devices were by Sony, there is a lot of difference. In Sony devices, there was no need to unlock bootloader to root, but it seems that for rooting 3T, I need to unlock bootloader. Even that doesn't seem difficult since there is this great guide with a toolkit. But My concern is that do I need to backup any partition before I unlock bootloader? Like in Sony we had a TA partition, which could be backed up before unlocking bootloader and would get wiped after unlocking bootloader. This is just for keeping it as backup and restore it to device if I decide to lock bootloader again. Also, will I loose anything if I unlock bootloader? Such as anything specific to OEM or camera functionality?

Nope. On OP devices there's no permanent penalty for unlocking. If you ever want to go back, you can re-lock the bootloader. But: unlocking and locking will wipe your phone. So you can't carry over root to a locked bootloader.

dreinulldrei said:
Nope. On OP devices there's no permanent penalty for unlocking. If you ever want to go back, you can re-lock the bootloader. But: unlocking and locking will wipe your phone. So you can't carry over root to a locked bootloader.
Click to expand...
Click to collapse
Okay, that helps! So to return back to locked bootloader everything would need to be like stock(no root, custom recovery etc.)
I had read somewhere about EFS backup and that it is related to IMEI number of the phone. This need to be done before or after the rooting process?
Also, would I need to disable encryption (as it is seen enabled in settings) and remove the fingerprint lock option before unlocking bootloader?
And just to be clear, I'm going to do following steps in the sequence to flash TWRP and root, Please let Me know if it is correct:
1. Unlock bootloader
2. Flash TWRP.
3. Flash SuperUser
all this with the help of ToolKit of OnePlus 3T. I don't need to take backup as the phone is new.
Also, I will be flashing the phh SuperUser for support with Magisk as mentioned here.

Hey, do you guys know if you can get official OTAs if you have TWRP installed?

Former Z2 user here @Mirhawk
I did the advice backup as a precaution. Then did your 1,2,3 steps. May I ask, why Magisk? Is Android Pay currently working with stock ROM + Root + unlocked bootloader?
---------- Post added at 05:47 PM ---------- Previous post was at 05:45 PM ----------
Mirhawk said:
Okay, that helps! So to return back to locked bootloader everything would need to be like stock(no root, custom recovery etc.)
I had read somewhere about EFS backup and that it is related to IMEI number of the phone. This need to be done before or after the rooting process?
Also, would I need to disable encryption (as it is seen enabled in settings) and remove the fingerprint lock option before unlocking bootloader?
And just to be clear, I'm going to do following steps in the sequence to flash TWRP and root, Please let Me know if it is correct:
1. Unlock bootloader
2. Flash TWRP.
3. Flash SuperUser
all this with the help of ToolKit of OnePlus 3T. I don't need to take backup as the phone is new.
Also, I will be flashing the phh SuperUser for support with Magisk as mentioned here.
Click to expand...
Click to collapse
sajed98 said:
Hey, do you guys know if you can get official OTAs if you have TWRP installed?
Click to expand...
Click to collapse
AFAIK stock recovery is required. Otherwise install zip manually via downloads.oneplus.net

23Six said:
Former Z2 user here @Mirhawk
I did the advice backup as a precaution. Then did your 1,2,3 steps. May I ask, why Magisk? Is Android Pay currently working with stock ROM + Root + unlocked bootloader?
---------- Post added at 05:47 PM ---------- Previous post was at 05:45 PM ----------
AFAIK stock recovery is required. Otherwise install zip manually via downloads.oneplus.net
Click to expand...
Click to collapse
OK, thanks for your reply.

23Six said:
Former Z2 user here @Mirhawk
I did the advice backup as a precaution. Then did your 1,2,3 steps. May I ask, why Magisk? Is Android Pay currently working with stock ROM + Root + unlocked bootloader?
---------- Post added at 05:47 PM ---------- Previous post was at 05:45 PM ----------
AFAIK stock recovery is required. Otherwise install zip manually via downloads.oneplus.net
Click to expand...
Click to collapse
I'm not interested in Android Pay, as it doesn't work in My country, It is Pokemon Go I wanted, but I guess it doesn't work. Thanks for the infor though! It was a lot simple in Sony!

Bootloader Issue | FRP Lock | Root Guide

UPDATED:
Issue has been solved
( i buy 4 credits from dc unlocker and use HCU to read my boot loader code )
yes i know this is all from dc unlockcer yes they , unbrick my P9 but they also
changed the boot code when you flashed the rom via DC phoenix
im suspecting it that way .
Hello guys. Debranded P9 here
Nougat C432B386 Eva-L09
hw eu :country vendor
Bootloader unlocked and FRP lock
my device gets suffer from a hard brick
and recovered by DC Phoenix. In order to
have a Stable Nougat Firmware i decide to
debrand my phone ......
1st attempt : flashing the (.dgkmts AL10 chinese rom)
after flashing the chinese Al10 firmware
from DCUnlocker (.dgkmts) the device boot and
can be flashed into original stock rom
but the first attempt fails because my
vendor comes from a different build
2nd attempt: flashing the (.dgkmts AL10 chinese rom)
but this time, i decide to wipe NVME and OEM
after booting into system and checking my device
details my IMEI stays the same but Serial No is missing
so i had to use HCU to write my IMEI and Serial No.
and obtain a new vendor from hw eu
after booting system, I start to forced update the
EVA-L09C432B136
then i unlocked my bootloader at this stage
using the same bootloader code from Huawei
FIRMWARE:EVA-L09 C432B136
( please focus on this, i already unlocked the bootloader​
here , and allow the oem to unlock )
status : bootloader unlock
frp unlock
the process is successfully done and after that
i check my device details and perfectly debrand
my P9, after a minute it received an OTA update
from Huawei System Updater ( C432B186 )
I update into it and reboot and received another update
again C432B322 ( Nougat-beta version) and then
received the Final Build C432B386
SUMMARY STAGES:
bricked and wiped oem info / SN rewrite using HCU
1. AL10 Chinese rom >
2. C432B136 ( stock firmware)
( do unlocked bootloader )
3. OTA C432B186
4. OTA C432B322 ( Nougat beta )
5. OTA C432B386 ( Nougat Stable)
status : bootloader unlock
frp lock
I'm into that version C432B386
and now im having a trouble here
flashing the original bootloader code
command : fastboot oem unlock xxx-xxxx-xxx
it says : wrong password
failed to write the command
" is it possible to obtain a new bootloader code ?"
i don't know why the boot code changed even though
i use it in unlocking my Bootloader and it succeed
2nd scenario:
when i try to go to developer options and
go to Allow oem unlock
so that i can be able to obtain FRP unlock
but it is greyed out.
" i've read that if you're on Nougat and you are already
in unlocked bootlader, you will have this issue "
the possible way of unlocking FRP is relocked the
bootloader first and the OEM UNLOCK option will
come out.
i guess the solution is finding a new Bootloader code
but "how?" does anyone knows this?
3rd scenario: flashing new recovery
( expecting to have administrative rights )
i try to flash also the twrp nougat version
but it says verification error
command : fastboot flash recovery twrp3.1.0-3-eva.img
failed
i don't want to end up bricking my device again
I'm having a hard time to resurrect this and I don't
want to happen it again, I'm busy with my work so
i have to asked you guys, finding a best way how
to fixed this..
if someone is having a same situation like me
please participate on the thread and or someone who
already fixed this kind of issue please give us information . thank you !

oem info / SN rewrite using HCU
You rewrited the serial number? Yeah I don't know how to help you there...

benjamen50 said:
oem info / SN rewrite using HCU
You rewrited the serial number? Yeah I don't know how to help you there...
Click to expand...
Click to collapse
yes sir , there is HCU Client tool that can re-write Serial Number/IMEI / read bootcode
i use it and replaced the missing Serial Number of my device

vinfrix said:
yes sir , there is HCU Client tool that can re-write Serial Number/IMEI / read bootcode
i use it and replaced the missing Serial Number of my device
Click to expand...
Click to collapse
Imo, If you change serial.no then your unlock code would be different

Try relocking and again unlocking the bootloader.

_Frostplexx_ said:
Try relocking and again unlocking the bootloader.
Click to expand...
Click to collapse
i tried to but the code seems already changed.

FiKsTyLeR said:
Imo, If you change serial.no then your unlock code would be different
Click to expand...
Click to collapse
even if i write the same serial code ?

vinfrix said:
i tried to but the code seems already changed.
Click to expand...
Click to collapse
Dude i am in a similar situation.
I have the bootloader unlocked but frp is locked.
When you relocked and unlocked was the OEM unlock option changeable (not grayed out, no FRP LOCK) again?

revery0 said:
Dude i am in a similar situation.
I have the bootloader unlocked but frp is locked.
When you relocked and unlocked was the OEM unlock option changeable (not grayed out, no FRP LOCK) again?
Click to expand...
Click to collapse
yes if you unlock again it will come out

vinfrix said:
yes if you unlock again it will come out
Click to expand...
Click to collapse
As it turns out, you need to rollback to b182 and then upgrade to N through OTA.
dload b300
dload b182
OTA b386
OEM Unlock, ADB Debugging, USB Debugging
Unlock bootloader
twrp

revery0 said:
As it turns out, you need to rollback to b182 and then upgrade to N through OTA.
dload b300
dload b182
OTA b386
OEM Unlock, ADB Debugging, USB Debugging
Unlock bootloader
twrp
Click to expand...
Click to collapse
why should i rollback ?

[Video] Root EMUI 8.0

<Mod Edit>
Content removed and thread closed.

Yeah, yeah, flash a twrp recovery, use the integrated option for magisk install and install magisk app. In the EMUI 8 custom ROMs, there's SuperSu integrated. But I once I got frp lock when flashed magisk...

Stiliyan said:
Yeah, yeah, flash a twrp recovery, use the integrated option for magisk install and install magisk app. In the EMUI 8 custom ROMs, there's SuperSu integrated. But I once I got frp lock when flashed magisk...
Click to expand...
Click to collapse
Thats wierd if it gave you the frp lock, you can just remove that lock by going into dev settings -> allow oem unlocking.

I wasn't able to use this option. Maybe it's because of the custom ROM because I still use one and I can't use the oem unlock option, tough my frp is unlocked. But watch out.

Stiliyan said:
I wasn't able to use this option. Maybe it's because of the custom ROM because I still use one and I can't use the oem unlock option, tough my frp is unlocked. But watch out.
Click to expand...
Click to collapse
It should be enabled, what is your rom?

It happened on Elemental 1.1 by KingOfMezi first, now I use Morfus by Catuva, because of some bugs in Elemental before the today's fix. I was in Nougat, because I bricked my phone with that frp lock and the option was available. Now it's unavailable once again. I didn't check when I was on official EMUI 8, but it was probably available I think.

Stiliyan said:
It happened on Elemental 1.1 by KingOfMezi first, now I use Morfus by Catuva, because of some bugs in Elemental before the today's fix. I was in Nougat, because I bricked my phone with that frp lock and the option was available. Now it's unavailable once again. I didn't check when I was on official EMUI 8, but it was probably available I think.
Click to expand...
Click to collapse
If you really want to get frp removed you can check out dc unlocker... or dc phoenix to flash the full stock rom

I don't need it for now, I just said it like by the way, just watch out for frp lock and careful if you get it, especially if using custom ROM.

Stiliyan said:
I don't it for now, I just said it like by the way, just watch out for frp lock and careful if you get it, especially if using custom ROM.
Click to expand...
Click to collapse
Yeah i know, thats how i hard brickes my phone, had to use dc Phoenix to reflash because my attempts to unbrick just made it worse

davidhozic said:
Yeah i know, thats how i hard brickes my phone, had to use dc Phoenix to reflash because my attempts to unbrick just made it worse
Click to expand...
Click to collapse
If you have unlocked bootloader oem option in developer is grey and inactive. So if u screw something with magisk and deacrivate oem it means frp goes locked its very hard to activate oem and get frp unlocked again especially on Emui 8. In this case u must use DC unlocker, it means credits, or
You can use frp unlock.zip to flash via Twrp in order to enable oem and frp.
Zip file you can find on
https://4pda.ru/forum/index.php?showtopic=824139&st=440#entry71201755
or kindly ask @vovan1982 from Mtteam to share it.
Regards

Alexxxx1 said:
If you have unlocked bootloader oem option in developer is grey and inactive. So if u screw something with magisk and deacrivate oem it means frp goes locked its very hard to activate oem and get frp unlocked again especially on Emui 8. In this case u must use DC unlocker, it means credits, or
You can use frp unlock.zip to flash via Twrp in order to enable oem and frp.
Zip file you can find on
https://4pda.ru/forum/index.php?showtopic=824139&st=440#entry71201755
or kindly ask @vovan1982 from Mtteam to share it.
Regards
Click to expand...
Click to collapse
Or you can just get a custom rom installed that will be able to enable frp unlock and then just go back to emui 8

davidhozic said:
Or you can just get a custom rom installed that will be able to enable frp unlock and then just go back to emui 8
Click to expand...
Click to collapse
Yes, one more method [emoji106][emoji108]
Sent from my WAS-LX1 using Tapatalk

Alexxxx1 said:
If you have unlocked bootloader oem option in developer is grey and inactive. So if u screw something with magisk and deacrivate oem it means frp goes locked its very hard to activate oem and get frp unlocked again especially on Emui 8. In this case u must use DC unlocker, it means credits, or
You can use frp unlock.zip to flash via Twrp in order to enable oem and frp.
Zip file you can find on
https://4pda.ru/forum/index.php?showtopic=824139&st=440#entry71201755
or kindly ask @vovan1982 from Mtteam to share it.
Regards
Click to expand...
Click to collapse
Thank you my friend.
You must flash via TWRP.

Is it possible to re-lock bootloader after official unlock?

I'm doing some research before I commit to unlocking my bootloader, and I can't find anything definitive on whether or not it's possible to re-lock after unlocking with the official tool. I have experience unlocking and re-locking bootloaders, flashing custom recoveries/ROMs/kernels etc but only with Nexus and Samsung phones, so I just want to make sure I'm clear on how Nokia's setup differs (If at all). Would also be interested to find out if Nokia will still offer me OTA's with unlocked bootloader.
Thanks for any help, and feel free to move or close the thread if it matches another one that I've missed.

Bb

2WildFirE said:
I'm really sure you can relock bootloader. Why not?
And yes ota works fine with open bootloader if you are on stock
Click to expand...
Click to collapse
Awesome, cheers for the assist ?

2WildFirE said:
I'm really sure you can relock bootloader. Why not?
And yes ota works fine with open bootloader if you are on stock
Click to expand...
Click to collapse
Nokia says that relooking isn't possible. Is there anybody who tried the command 'fastboot oem relock'?

And why says this text please lock ? the bootloader, if it is not possible?

2WildFirE said:
And why says this text please lock ? the bootloader, if it is not possible?
Click to expand...
Click to collapse
Dude, crop out that serial number?

Go to download mode
Run adb:fastboot oem lock
Choose lock bootloader in your phone

namle98 said:
Go to download mode
Run adb:fastboot oem lock
Choose lock bootloader in your phone
Click to expand...
Click to collapse
confirmed, i did it today

Since I also unlocked critical, I ran: fastboot oem lock_critical and then fastboot oem lock
Phone will factory reset both times.

Has anyone tried the re-lock with a custom kernel/ROM?

dimitar10 said:
Has anyone tried the re-lock with a custom kernel/ROM?
Click to expand...
Click to collapse
No, and nobody should do it. It will brick your device.
The point of a locked bootloader is to prevent unofficial software from running, and the point of unlocking it is to make that possible. So relocking the bootloader with unofficial software installed will make the phone think that the software got corrupted and rightfully lock down the device.

THMSP said:
No, and nobody should do it. It will brick your device.
The point of a locked bootloader is to prevent unofficial software from running, and the point of unlocking it is to make that possible. So relocking the bootloader with unofficial software installed will make the phone think that the software got corrupted and rightfully lock down the device.
Click to expand...
Click to collapse
Basically anyone should be able to do it and it shouldn't brick your device, as per Google's bootloader recommendations. However, manufacturers decide to cripple bootloaders not to support it in the verified boot chain (where kernel verification can be explicitly made against a custom root of trust set after the device has left the factory i.e. set by the user, instead of the original root of trust). As far as I know, only Pixel devices implement this, and can be achieved by issuing the command:
Code:
fastboot flash avb_custom_key <key_blob>
I'm sure there are lots of advanced users/modders that can find this feature beneficial (if implemented by the device vendors).

dimitar10 said:
Basically anyone should be able to do it and it shouldn't brick your device, as per Google's bootloader recommendations. However, manufacturers decide to cripple bootloaders not to support it in the verified boot chain (where kernel verification can be explicitly made against a custom root of trust set after the device has left the factory i.e. set by the user, instead of the original root of trust). As far as I know, only Pixel devices implement this, and can be achieved by issuing the command:
Code:
fastboot flash avb_custom_key <key_blob>
I'm sure there are lots of advanced users/modders that can find this feature beneficial (if implemented by the device vendors).
Click to expand...
Click to collapse
I accidently locked the bootloader and without locking critical with custom recovery in system.
now it's saying data is corrupt and phone can't be trusted.
that unlock key url got expired and there is no way i can get that unlock key .
is there any other way to fix my phone??
Code:
fastboot flash avb_custom_key <key_blob>
how to use this code? any specific key_blob for nokia 8 or is it supported on this phone?
help me guys ;(
Edit:
After so many tries, I went to service centre and they fixed the phone in few mins :highfive::silly:

Crazy Tweaks said:
I accidently locked the bootloader and without locking critical with custom recovery in system.
now it's saying data is corrupt and phone can't be trusted.
that unlock key url got expired and there is no way i can get that unlock key .
is there any other way to fix my phone??
Code:
fastboot flash avb_custom_key <key_blob>
how to use this code? any specific key_blob for nokia 8 or is it supported on this phone?
help me guys ;(
Edit:
After so many tries, I went to service centre and they fixed the phone in few mins :highfive::silly:
Click to expand...
Click to collapse
I have the same problem right now. May i ask how they fixed it and what did you tell them ?
---------- Post added at 03:31 PM ---------- Previous post was at 03:27 PM ----------
CommieTurtle said:
I have the same problem right now. May i ask how they fixed it and what did you tell them ?
Click to expand...
Click to collapse
Did they fix it for free since bootloader is locked? I'm going to service centre in few hours

CommieTurtle said:
I accidently locked the bootloader and without locking critical with custom recovery in system.
now it's saying data is corrupt and phone can't be trusted.
that unlock key url got expired and there is no way i can get that unlock key .
is there any other way to fix my phone??
I have the same problem right now. May i ask how they fixed it and what did you tell them ?
---------- Post added at 03:31 PM ---------- Previous post was at 03:27 PM ----------
Did they fix it for free since bootloader is locked? I'm going to service centre in few hours
Click to expand...
Click to collapse
Well it wasn't in warranty xD so just asked me this and boom it was not free after that but well yeah it doesn't matter if it's locked or unlocked lol as long as they are getting paid, they'll do it hahahha

Crazy Tweaks said:
Well it wasn't in warranty xD so just asked me this and boom it was not free after that but well yeah it doesn't matter if it's locked or unlocked lol as long as they are getting paid, they'll do it hahahha
Click to expand...
Click to collapse
lol my device was under warranty so I got it fixed for free

I can assume that, in service centers, they are able to reflash the entire firmware including the (secondary) bootloader. They would probably boot the device into EDL mode, and flash it with stock firmware, with a properly signed Qualcomm EDL programmer, and use Qualcomm's QFIL tool to do this.

CommieTurtle said:
lol my device was under warranty so I got it fixed for free
Click to expand...
Click to collapse
Glad to hear that

Flashing Custom Rom on Canadian Variant of S9

can you flash custom ROM on galaxy s9 Canadian variant?
Model: SM-G960W.
I don't have OEM unlocking option in my developer settings but when I connect my phone to ODIN it detects it and says added.

Boot into odin and look for "Activation Lock OFF" if it says that, you probably can

Alyee said:
can you flash custom ROM on galaxy s9 Canadian variant?
Model: SM-G960W.
I don't have OEM unlocking option in my developer settings but when I connect my phone to ODIN it detects it and says added.
Click to expand...
Click to collapse
Did you ever find out if you were able to flash a custom rom to it?

Anduril97 said:
Did you ever find out if you were able to flash a custom rom to it?
Click to expand...
Click to collapse
You can't the bootloader is locked and not unlockable
---------- Post added at 07:42 PM ---------- Previous post was at 07:41 PM ----------
AudioMiner said:
Boot into odin and look for "Activation Lock OFF" if it says that, you probably can
Click to expand...
Click to collapse
Please don't answer a post if you don't know the correct information. These devices have permanently locked bootloader and cannot be flashed. All you did is cause confusion

2 years late but it sucks than I can't modify this phone due to bootloader locked