How to relock the bootloader? - ZTE Axon 7 Questions & Answers

Hi,
I have Axon 7 2017U on B35 but I am really struggling to lock the bootloader. Not sure why it's so hard to lock it. I tried axon 7 toolkit also, it fails after booting into recovery, or fastbooting.
I ran fastboot manually using volume keys but it just shows the same "your device can't be checked for corruption, please re-lock your bootloader".
Anyone knows how I can lock the bootloader? I am on stock B35.
Thanks in advance!

lachdanan said:
Hi,
I have Axon 7 2017U on B35 but I am really struggling to lock the bootloader. Not sure why it's so hard to lock it. I tried axon 7 toolkit also, it fails after booting into recovery, or fastbooting.
I ran fastboot manually using volume keys but it just shows the same "your device can't be checked for corruption, please re-lock your bootloader".
Anyone knows how I can lock the bootloader? I am on stock B35.
Thanks in advance!
Click to expand...
Click to collapse
EDL back to MM B19, enter Fastboot, fasboot oem lock

Related

[SOLVED] A2017G bootloader relock.

Has anyone successfully relocked the bootloader on a A2017G? I've tried flashing various versions of Nougat and now with the new official Oreo and every time I try booting to bootloader (fastboot) the phone just boots into system. I'm on full stock system with stock recovery. I flashed a B12 EDL from LOS 15.1 to then update to the new Oreo.
Everything else works fine, the drivers are correct I simply just cannot access the bootloader, no matter which rom I flash.
Hi, on A2017G I succeeded with Axon 7 toolkit, option "bootloader lock"
pudil said:
Hi, on A2017G I succeeded with Axon 7 toolkit, option "bootloader lock"
Click to expand...
Click to collapse
Hi. I tried that but no luck. It just reboots the phone back to system
Problem solved, I've managed to lock the bootloader.
Victor13f said:
Problem solved, I've managed to lock the bootloader.
Click to expand...
Click to collapse
Can You tell us how? I am on Stock Nougat , but I unlocked propabaly on Marshmallow and then updated for Nougat. I cannnot boot to fastboot mode, my phone just reboots to system, as your before.
Filozof71 said:
Can You tell us how? I am on Stock Nougat , but I unlocked propabaly on Marshmallow and then updated for Nougat. I cannnot boot to fastboot mode, my phone just reboots to system, as your before.
Click to expand...
Click to collapse
I flashed a fastboot EDL unlock that I found here on XDA and then I managed to lock the bootloader with OEM lock. However, I bricked my phone and couldn't boot into OS but it wasn't a big issue since I just flashed a B12 EDL afterwards and from there got an OTA update to Oreo with the bootloader locked.

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
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
Seems that TWRP was inatlled before the bootloder was locked again.

Trying to re-lock the bootloader

I have a A2017U that I just downgraded to B35 using this guide: https://forum.xda-developers.com/axon-7/how-to/guide-axon-7-universal-unbrick-t3814413
I want to lock the bootloader to stop the annoying boot warning but can't get into fastboot when using AXON7TOOLKIT.
I tried flashing A2017U_FASTBOOT_UNLOCK_EDL (downloaded from https://forum.xda-developers.com/axon-7/how-to/complete-guide-to-unlocking-installing-t3561128) through miFlash but I still can't get into the bootloader.
What can I do?
EDIT: Thanks everyone! I used the toolkit to unlock the bootloader again, then locked it. For some reason I couldn't access the bootloader even though i got the bootloader ulocked warning.
mateokross said:
I have a A2017U that I just downgraded to B35 using this guide: https://forum.xda-developers.com/axon-7/how-to/guide-axon-7-universal-unbrick-t3814413
I want to lock the bootloader to stop the annoying boot warning but can't get into fastboot when using AXON7TOOLKIT.
I tried flashing A2017U_FASTBOOT_UNLOCK_EDL (downloaded from https://forum.xda-developers.com/axon-7/how-to/complete-guide-to-unlocking-installing-t3561128) through miFlash but I still can't get into the bootloader.
What can I do?
Click to expand...
Click to collapse
You only want to lock it because of the boot warning? There are flashables to get rid of that... I dom't know which exact files there are for stock B35 or Oreo but there are some going around.
hell you could even go custom and use the splash bootstack if you wanted.
If you want to lock anyways, you have to get an A2017U B19 package and flash it via EDL Tool (or MiFlash). Right after that you'll have fastboot. enable oem unlocking then enter fastboot and issue fastboot oem lock and you're done. But it's way too overkill if you want to just get rid of the 5 sec screen
mateokross said:
I have a A2017U that I just downgraded to B35 using this guide: https://forum.xda-developers.com/axon-7/how-to/guide-axon-7-universal-unbrick-t3814413
I want to lock the bootloader to stop the annoying boot warning but can't get into fastboot when using AXON7TOOLKIT.
I tried flashing A2017U_FASTBOOT_UNLOCK_EDL (downloaded from https://forum.xda-developers.com/axon-7/how-to/complete-guide-to-unlocking-installing-t3561128) through miFlash but I still can't get into the bootloader.
What can I do?
Click to expand...
Click to collapse
you need to flash original stock rom for your device trough edl. (rom your device came from factory,marshmallow)
then boot into system,unlock developer options.Allow oem unlock and turn on usb debugging.Now connect phone to laptop and check the dialogue on your phone that ask for usb debug.Unplug phone.
When you did this you want to flash TWRP trough EDL.
Now boot in TWRP and flash UnlockbootloaderPackage from DrakenFX.
Reboot system.
Now turn off your device and boot into fastboot,connect your phone with laptop and open ADB terminal on your laptop or use Axon7toolkit.
In terminal enter fastboot oem lock,or in axon7toolkit choose lock bootloader.
Your bootloader is now locked.
PS: you dont need locked bootloader to recieve ota's,and make sure you are on the firmware your device came shipped with!!
You need a locked bootloader to get rid of the warning message ( dont flash any mod package that claims it delete the warning page)

Lock bootloader in Stock oreo

I am using A2017U, and for some reasons i unlocked my bootloader and flashed custom rom. Now i want to lock my bootloader but i tried several times to enter fastboot but the device is not entering fastboot through any mean, i tried through physical kepess through adb command, everything.
please help me.
teji007 said:
I am using A2017U, and for some reasons i unlocked my bootloader and flashed custom rom. Now i want to lock my bootloader but i tried several times to enter fastboot but the device is not entering fastboot through any mean, i tried through physical kepess through adb command, everything.
please help me.
Click to expand...
Click to collapse
Maybe by using Axon 7 EDL toolkit to enable fastboot first (Unlock option), then "fastboot oem lock" in fastboot mode. Refer to https://forum.xda-developers.com/showpost.php?p=78267172&postcount=200 . Warning : you need stock ROM (no changes in boot, recovery, system/root etc...) to avoid bricking your phone.

Nexus 10 can't unlock bootloader

Hello,
I have a friend's tablet Nexus 10 who has a problem with booting the system. I should be flashing it via fastboot but I can't do that because the bootloader is locked. When I try to unlock the bootloader via fastboot, it offers me 'YES' or 'NO' options on the screen. When I click 'NO' the tablet restarts properly and enters bootloop (which is a problem). And when I click 'YES' to unlock it, the tablet locks up and doesn't respond to any commands until I get into fastboot or bootloader unlock again. Do you know what to do?
Thanks in advance,
Uros.
I'm on the same boat here. Tried to unlock the bootloader but happens the same thing you are describing.
Did you have any luck in the end?
Thanks in advance.
SPQR.

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