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Bricked Axon 7 after re-locking bootloader

Long story short. I had an Axon 7 A2017 B11 which I updated to B13. I was able to unlock the bootloader, root the phone then flash a custom rom Z.A.D.Mix7_v0.3. I was having fun with the phone but I did something very stupid when I realised I could not use Android pay due to unlocked boot loader. Without doing enough research, I went to fastboot and did a fastboot oem lock. The command was successful but I could no longer boot into the system or recovery or fastboot. I tried MiFlash with B07 which was posted in this forum, but it did not work, came back an error of bad format. Then I used axon7tool to flash TWRP 3.0.2 and the boot.img which I extracted from B13. I am now able to boot into TWRP and fastboot. But I still do not have a working system. I tried fastboot oem unlock, it does not let me do it. I flash ZAD Mix7 again but once I flash that it does not boot anymore. I am now really stuck. What should I do to go back to stock then start everything again. Thanks a lot for the help.

I understand your device doesn't boot into system anymore, but can adb on your pc detect it at all? If so, you can try following all steps after "B)" in my tutorial. I think your aboot img and fbop partition are messed up. If you can use adb to replace the files in aboot and fbop with files that allow the fastboot oem unlock command to be executed, it should be unlockable again. After that, custom ROMs should boot.

Stock bootloader
Controllerboy said:
If you can use adb to replace the files in aboot and fbop with files that allow the fastboot oem unlock command to be executed, it should be unlockable again. After that, custom ROMs should boot.
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I'm having a similar issue. Although my phone boots to stock rom I seem to have messed up my bootloader. I had TWRP and unlocked bootloader. I, similarly, locked the bootloader and things seemed to be fine. After attempting to install Nougat received from OTA I realized my bootloader is corrupted. When I hold the power and volume up the phone seems to just turn off (or go to EDL mode? I'm not sure) I can always just hold power and it'll boot up normally. Is there a way to get the stock bootloader to work and keep it locked?

I also bricked my A7 after relocking my bootloader. I used tenfar's tool to make TWRP my boot.img, then flashed ZTE's stock B20 image. Here's the thread where I found the file links.
From there I updated all the way up to the OTA Nougat, but I suppose you can decide where you want to go after it's unbricked. Hope this helps.

Why are so many people relocking bl? Regardless, always take an ota before locking to ensure you are completely shock.

Stock bootloader
lafester said:
Why are so many people relocking bl? Regardless, always take an ota before locking to ensure you are completely shock.
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Don't you have to be running a locked bootloader in order to be able to install OTAs?

aabnamak said:
Don't you have to be running a locked bootloader in order to be able to install OTAs?
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Click to collapse
Of course not.

aabnamak said:
Don't you have to be running a locked bootloader in order to be able to install OTAs?
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Click to collapse
No, you do not. I thought that was the case at first as well, but I was mistaken. You do, however, need the stock recovery and an untouched system partition.

My problem is that I don't seem to have a recovery at all. I realized once the ZTE logo pops up I can hold down both volume keys and get to the bootloader. The bootloader is locked but does not display a bootloader version or basedband version. I tried the tenfar tool (axon7root.exe) and now my phone doesn't boot into the system either. I really need help...

Just an update to everyone that helped.
I finally managed to fix it.
I used axon7tool to flash a signed TWRP, so that i can boot into TWRP. The signed TWRP is the only way to make it work. Then I downloaded the A2017 B11 from this thread
https://forum.xda-developers.com/axon-7/development/rom-guide-updates-to-stock-files-via-t3469484
There are two zip files. The boot stack and the rom. Because it is a stock rom, I can boot into the system. The next thing I did was to enable the developer option and turn back on the option to allow OEM unlock.
I went back to TWRP. boot into the fastboot screen. Then I simply typed in 'fastboot oem unlock'.
I went back to TWRP, which says can't read encrypted device. I formated everything. mount the USB then flash the custom rom again.
Hola, phone fixed. Made me sweat for the whole day.

deleted...forgot I had a micro sd card. Flashed stock update from the card and it worked. Phew!

Zenfone Selfie bootloop / unlock bootloader

Hi everybody
My Zenfone Selfie after a normal update (never modified) is in bootloop.
So I installed adb and fastboot and I flashed the twrp.
Then I tried in every way to flash a rom. I've tried both with official firmware and with various versions of cyanogenmod. Through fastboot and via adb sideload.
Even if seems to work, when I reboot I get the bootloop problem again.
As far as I can understand the problem it’s that I have the bootloader still locked. The official apk solution I guees it’s not applicable in my case. By fastboot oem unlock i get an error message (probably why i can not enable usb debug).
Do you know of other ways to unlock the bootloader or in general to flick my phone?
Thanks to everyone for the help

Anyway to unlock oem from bootloader or TWRP?

I was trying to flash the stock image and i guess i messed up somewhere because after i did that i locked the bootloder and not it is not booting past the google screen. i want to reflash all images but i cant cause the bootloader is locked. so is there anyway to unlock the oem in bootloader or recovery mode TWRP? i can access terminal in TWRP so any command that can help me?

TheTickReborn said:
I was trying to flash the stock image and i guess i messed up somewhere because after i did that i locked the bootloder and not it is not booting past the google screen. i want to reflash all images but i cant cause the bootloader is locked. so is there anyway to unlock the oem in bootloader or recovery mode TWRP? i can access terminal in TWRP so any command that can help me?
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Maybe try and sideloading the it's through twrp. I can't remember if an unlocked bootloader is needed though. Also, you could maybe try flashing a custom ROM to see if you can boot into it.

A2017G How to relock bootloader on Nougat B10

I came back from LOS 16.0. Flashed A2017G_B10_NOUGAT_FULL_EDL in EDL but there's a warning that my bootloader is locked. I wanted to relock it but the warning prevents me from entering bootloader or fastboot (or maybe they are not even present....). Next I flashed A2017U_FASTBOOT_UNLOCK_EDL in MiFlash but it did not do anything. It flashed OK but I still cannot access fastboot. Should I flash some marshmallow rom? Thanks in advance.

I have the same problem. Cannot enter fastboot mode on Nougat ROM.

Ok I found the way usin Axon 7 Toolkit
1. Set the Android version to 7 using option 13
2. Perform unlock bootloader
Following instruction Axon & Tookit gives you EDL image of the proper fastboot partition giving the possibility to enter fastboot mode
then fasboot oem lock

I wanted to say thanks that works, but apparently my phone is bricked now - it hangs on green ZTE logo. PC recognizes it as DFU. Cannot enter EDL either. I guess I look for some guide how to recover from this situation
Managed to fix that. Somehow I was able to enter fastboot. It said my bootloader was locked so i flashed TWRP and from TWRP using ADB installed stock Nougat rom

ma_ko said:
I wanted to say thanks that works, but apparently my phone is bricked now - it hangs on green ZTE logo. PC recognizes it as DFU. Cannot enter EDL either. I guess I look for some guide how to recover from this situation
Managed to fix that. Somehow I was able to enter fastboot. It said my bootloader was locked so i flashed TWRP and from TWRP using ADB installed stock Nougat rom
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If you was able flash twrp mens your boolaeder was unlocked?

No there's a TWRP that works on locked bootloader.

ma_ko said:
No there's a TWRP that works on locked bootloader.
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Click to collapse
Seems that TWRP was inatlled before the bootloder was locked again.

relocking bootloader

Hi,
I am having a problem trying to relock my bootloader.
i am selling my g4, so needed to remove my custom rom, flash stock and relock my bootloader.
I downloaded and flashed via twrp the stock 8.1 ROM on the g4 plus page. ( stock rom in twrp format)
That went fine.
Then I booted into fastboot , and entered fastboot lock command fastboot oem lock
It said the android image was not valid?
So I then entered fastboot flashing lock
it rebooted fine to the stock android , but now the bootloader warning says ''your device has loaded a different operating system'', and thens boots 8.1.
DO you think I should go back anf flash stock rom ( not a twrp flashable version), using fastboot commands, ending with 'fastboot oem lock' ?
Just dont want to brick it, as it is now sold!
Many Thanks for any help
pootler
P.S. the TWRP I am using is a custom one ( i think )

pootler said:
Hi,
I am having a problem trying to relock my bootloader.
i am selling my g4, so needed to remove my custom rom, flash stock and relock my bootloader.
I downloaded and flashed via twrp the stock 8.1 ROM on the g4 plus page. ( stock rom in twrp format)
That went fine.
Then I booted into fastboot , and entered fastboot lock command fastboot oem lock
It said the android image was not valid?
So I then entered fastboot flashing lock
it rebooted fine to the stock android , but now the bootloader warning says ''your device has loaded a different operating system'', and thens boots 8.1.
DO you think I should go back anf flash stock rom ( not a twrp flashable version), using fastboot commands, ending with 'fastboot oem lock' ?
Just dont want to brick it, as it is now sold!
Many Thanks for any help
pootler
P.S. the TWRP I am using is a custom one ( i think )
Click to expand...
Click to collapse
Use LMSA flash rescue option if you have a Windows machine
(Lenovo) MOTO Smart Assistant (PC)
then see
Relocking the bootloader

sd_shadow said:
Use LMSA flash rescue option if you have a Windows machine
(Lenovo) MOTO Smart Assistant (PC)
then see
Relocking the bootloader
Click to expand...
Click to collapse
THanks for the reply.
Strange, thought I had already updated this
I went back to stock firmware and decided to flash with fastboot all individual files.
At some point, I got the same ''verification failed' but the command line suggested flashing system, boot, and ( something else, cant remember) again.
i did this this, and this time, no errors occured, and I had a complete install, with a locked bootloader, and no bootloader warning screen.!
Yay - result
Thanks again for your advice - I will remember it for the future.