UNLOCK/RELOCK BOOTLOADER UNOFFICIALLY for ZenFone 3

[Saktis]

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).

[joshuavaz_jv]

Will this work for latest Oreo update?ze520kl?

[mansuetolim]

Are their any file available for Zenfone 3 deluxe, Thanks

[joshuavaz_jv]

mansuetolim

Are their any file available for Zenfone 3 deluxe, Thanks

View post

The above method worked for my Zenfone 3 (520kl). Had to do it Unofficially as Asus unlock tool was not working and Asus was not at all helping.
You may be able to find the factory RAW and Oreo ROM (or any latest ROM) on XDA. Shouldn't be a problem.

[vignesh88]

Hi Saktis,
Thanks for ur post...I have followed the instructions given ..I have flashed my ZF3 but it is stuck in Asus LOGO..can u pls help me.