[GUIDE] How To Unlock Bootloader and Stay Stock (A2017U - A2017)

[DrakenFX]

YOU MUST HAVE ACCESS TO TWRP TO PROCEED
THIS WILL NOT WORK IF YOU DON'T HAVE TWRP

I'M NOT RESPONSABLE IF THIS PROCESS CREATED A THERMAL NUCLEAR DEVICE
AND / OR TURN YOU INTO FIRESTORM.
NOT RESPONSABLE IF SOMETHING HAPPEN DURING THIS INSTALLATION OR IF
YOU DO A MISTAKE DURING THIS PROCESS

READ, READ , READ , READ AND BE CAREFULL WITH THE COMMAND LINES

PROCEED ON YOUR OWN RISK​

READ, READ, READ BEFORE PROCEEDING....
​

Hi A7 Users
--------------

Here we are with a new / excited finding ( thanks @Unjustified Dev )for ALL of us A2017U and A2017G (IS GETTING OFFICIAL UNLOCK AND THIS METHOD NOT TESTED YET,ANY VOLUNTEER?)
and is about UNLOCKING the Bootloader for those who are stock B20 or B27 + Lock Booloader.

Only IMPORTANT requirement is you need to have TWRP install, so if you don't have TWRP install here is the link
and you just NEED TO INSTALL TWRP and if you haven't back-up your STOCK boot.img is the right time to do so

Click Here on How to Flash TWRP with Lock Bootloader, Thank You @tennear

NOTE : THIS PROCEDURE WILL ERASE , I REPEAT WILL ERASE YOUR DATA + INTERNAL STORAGE.

SDCARD IS SAFE.

Steps :
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1- Download this File TWRP_UnlockBootloaderPackage_by_DrakenFX.zip and move to your SDCard.
2- Enable "OEM UNLOCKING" under Developer Options
3- Reboot to TWRP

 adb reboot recovery

4- Lets make sure your device is detected

 adb devices

Great let keep going.
5- Open Command and navigate to your adb location.
6- Type the following
* BACK-UP AND PULL CURRENT FASTBOOT IMAGE

adb shell dd if=/dev/block/bootdevice/by-name/fbop of=/sdcard/fbop_lock.img
adb pull /sdcard/fbop_lock.img

* FLASH TWRP_UnlockBootloaderPackage_by_DrakenFX.zip
Awesome you have backup and flash the bootloader unlock package file but wait we're done yet

7- Type the Following

adb reboot bootloader

8- Lets make sure device is present

fastboot devices

9- Now let's Unlock the Bootloader (THIS WILL WIPE DATA+INTERNAL STORAGE)

fastboot oem unlock

10- You'll boot in TWRP once there do the following :

 * tap [B]CANCEL[/B]
 * tap [B]WIPE [/B]
 * tap [B]FORMAT DATA[/B] and Follow the Instructions

11- Once done REBOOT
12- WHEN FULL BOOT GO BACK TO TWRP AND CREATE A BACK-UP AND KEEP IT SAFE
13- Have Fun you're now Bootloader Unlock With Stock B20 or B27 Software.

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NOTE : A2017U.B27 Users Everytime you BOOT to System , Recovery, etc, etc you'll be getting a splash screen, JUST WAIT 5 SEC. and your device will boot to where you want to go.

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If You Have the A2017G version and you are already on B03 you can follow step by @Starvirus
A2017G_B03 Unlock Bootloader Steps
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CREDIT / Contributor
- @Unjustified Dev for testing in his Brand New just less than 3 hrs old A2017U and popping up in me the idea about this finding
- Thank you @regenwurm16 for Confirm New method working for A2017G
- Thank you @Starvirus for provide B03 steps

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[DrakenFX]

reserve 1

 

[DrakenFX]

reserve 2

 

[DrakenFX]

reserve 3

 

[Unjustified Dev]

Mine

 

[jpde]

So.. this means unlocked bootloader for full flexibility but also OTA updates because it's still running stock?

 

[runderekrun]

So jelly. Stuck on B20_boot over here.

 

[DrakenFX]

So.. this means unlocked bootloader for full flexibility but also OTA updates because it's still running stock?

about right, as long you have an Untouch/UnModded System + boot, so yeah

So jelly. Stuck on B20_boot over here.

@Unjustified Dev is uploading something that will help us go back to B20, I'll be testing this as soon is done and create a Thread for it, is just matter of time

 

[jpde]

about right, as long you have an Untouch/UnModded System yeah

Holy crap, that sounds awesome. Huge thanks for all of your work! Hoping someone will be able to confirm that it works on the A2017G

 

[Keiler90]

Just wow!
Thats what I have talked about.

I hope it works on the A2017G version.

 

[legendarygizmo]

Is this reversible? Would ZTE somehow be able to tell if the bootloader was unlocked before when returning the device for a warranty?

 

[DrakenFX]

Is this reversible? Would ZTE somehow be able to tell if the bootloader was unlocked before when returning the device for a warranty?

yes it is, just keep your fastboot img in a safe place backup is in OP part of the guide.
to revert back is very simple same step but instead using fastboot_unlock.img you use your fastboot backup and do the rest of the steps (wipe and so on)

 

[Unjustified Dev]

yes it is, just keep your fastboot img in a safe place backup is in OP part of the guide.
to revert back is very simple same step but instead using fastboot_unlock.img you use your fastboot backup and do the rest of the steps (wipe and so on)

Don't forget fastboot oem lock

Sent from my ZTE A2017U using Tapatalk

 

[DrakenFX]

Don't forget fastboot oem lock

Sent from my ZTE A2017U using Tapatalk

annnddd that too

 

[SinisterXReaper]

Do you think there will ever be a way to unlock without wiping internal?

Sent from my ZTE A2017U using XDA-Developers mobile app

 

[Unjustified Dev]

Do you think there will ever be a way to unlock without wiping internal?

Sent from my ZTE A2017U using XDA-Developers mobile app

Unfortunately it's necessary.

Sent from my ZTE A2017U using Tapatalk

 

[DrakenFX]

Do you think there will ever be a way to unlock without wiping internal?

Sent from my ZTE A2017U using XDA-Developers mobile app

been honest in Marshmallow, i remember in Lollipop you could unlock bootloader and keep everything but in Marshmallow everything change, any device i had that need bootloader unlock it wipes.

 

[xxBrun0xx]

We essentially just forced ZTE's legal department's hand. They now have no way of voiding warranty with unlocked bootloader. Nice job guys!

 

[blessingme]

Can I do this procedure with Axon Zte 7 A2017? (China Model)

Moderator Edit: @blessingme - it is not necessary or desirable to quote the entire OP. It can cause page loading issues with those on limited bandwidth or when mobile.

Thanks

 

[Unjustified Dev]

Can I do this procedure with Axon Zte 7 A2017? (China Model)

If you have twrp installed, let us know and don't forget to backup your fastboot.img

Sent from my ZTE A2017U using Tapatalk