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UNLOCK/RELOCK BOOTLOADER UNOFFICIALLY for ZenFone 3

SaktisSaktis Level 1
edited September 2020 in Fan Chat

Make sure you’ve backed up all of your IMPORTANT DATA before unlocking/relocking bootloader

I am not responsible for bricked devices and dead SD cards. YOU are choosing to make these modifications, and if you point the finger at me for messing up your device, I will laugh at you.

First and foremost, please install ZenFone 3 Drivers via Device Manager (Download drivers on ASUS Support Website)


1) Download the Factory RAW ROM here:

ZE520KL: https://bit.ly/FAC520

ZE552KL: https://bit.ly/Fac552


2) Download ASUS Flash Tool here: https://bit.ly/ASUSFT

Download Drivers here: https://bit.ly/kitzenfone3


3) Flash the firmware via ASUS Flash Tool by entering FASTBOOT MODE (Power Button + Volume Up) & DO NOT WIPE DATA!


Note: This firmware can only boot into FASTBOOT Mode. So, don’t panic

Note: If you flash RAW firmware via ASUS Flash Tool and received an error (FRP request error), just IGNORE the error.


4) Enter FASTBOOT mode (Power Off + Volume Up)


UNLOCKING

5)

  • Open Command Prompt/Windows Powershell
  • Now copy and paste this: fastboot devices
  • If it shows serial number of your ZenFone 3, you are good to go
  • Now copy and paste this: fastboot oem unlock
  • After that, copy and paste this: fastboot reboot bootloader

Congratulations, your device has been unlocked unofficially. (You can see the "Device State" on FASTBOOT splash screen) 


RELOCKING

5)

  • Open Command Prompt/Windows Powershell
  • Now copy and paste this: fastboot devices
  • If it shows serial number of your ZenFone 3, you are good to go
  • Now copy and paste this: fastboot oem lock
  • After that, copy and paste this: fastboot reboot bootloader


Congratulations, your device has been locked (You can see the "Device State" on FASTBOOT splash screen)

P.S: If you unlocked officially and you want to relock your bootloader, OTA does not work because your Serial Number has been recorded by ASUS.

6) After that, download the stock Oreo RAW ROM here and flash it via ASUS Flash Tool (FASTBOOT Mode) (DO NOT WIPE DATA):

ZE520KL: https://bit.ly/OreoZE520KL

ZE552KL: https://bit.ly/OreoZE552KL


If anything, contact me via Telegram

User Name: @SaktisWRXSTi

Note: If you flash RAW firmware via ASUS Flash Tool and received an error (FRP request error), just IGNORE the error.

Note: If it asks for PIN after booting up, just wipe data & cache via Recovery Mode (Power Button + Volume Down).

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