Asus ROG Phone II ZS660KL Unlock Bootloader – Comprehensive Guide

We have included all the steps in this post to unlock bootloader on Asus ROG Phone II ZS660KL. Simply, follow this guide and you will end up unlocking the bootloader successfully.

If you get bored with the stock firmware of your smartphone and want to play around with more customization, then you will need to get your device rooted. But you can’t be able to root your device before unlocking the bootloader.

unlock bootloader

What is Bootloader?

In simple words, a bootloader is a set of instructions that are executed automatically, whenever the device is turned ON. The operating system and Kernel need bootloader instructions to start the boot process and operate the recovery mode.

By default, the bootloader of every smartphone is locked. The reason behind it is very obvious as every manufacturer wants the users to stay with their default provided skin and stock ROMs.

But as we know, Android is open-source and that gives more power and benefits to users to customize their smartphones with endless possibilities.

Therefore, Android also provides users an alternate route to customize their smartphones.

Benefits of Unlocking Bootloader
  • Gaining the root access
  • Allows to flash custom recovery
  • Installing different custom ROMs

Disadvantages
  • This process may void the phone warranty
  • The performance of your phone might also get affected
  • The process might brick your phone, if anything goes wrong
  • Might become a reason for disturbing the security of your smartphone
  • You might also lose the data available on your phone storage.

How To Unlock Bootloader on Asus ROG Phone II ZS660KL?

Asus ROG Phone II ZS660KL unlock bootloader

Pre-Requisites

  • You need to charge your smartphone to at least 70% or above.
  • Grab the original USB cable of your smartphone.
  • Make a complete back-up of your important data. Note: It will wipe all the data available on your phone storage.
  • Download Asus ROG Phone II ZS660KL Drivers.

Steps To Unlock Bootloader on Asus ROG Phone II ZS660KL

Unlike other Android smartphones, the Asus ROG Phone II ZS660KL is a bit different in terms of unlocking bootloader. The below steps will get your job done successfully.

Note: Unlocking Bootloader Will Cause Factory Reset on Your Device. Make sure to take a complete back-up of your important data!

Step 1: First of all, download the Asus ROG Phone II ZS660KL unlocking Tool APK File.

Step 2: Connect your smartphone to a computer via the original cable and transfer the downloaded unlock tool APK file to the phone storage.

Step 3: Once, the APK file is transferred to your phone, now install it on your phone by allowing the unknown source app permission.

Step 4: After the installation, launch the app and accept all the terms and conditions.

Step 5: Now, when you finally enter the App interface, simply tap on "Press to Unlock your Device".

Step 6: Be patient! wait for the process to get complete as during the process your device might reboot several times.

That's it, Now your Asus ROG Phone II ZS660KL has bootloader unlocked successfully.

How To Boot Asus ROG Phone II ZS660KL Into Fastboot Mode

  • Turn your Phone Off Completely.
  • Now, Press and hold Volume Up, and Power buttons simultaneously.
  • Once, the fastboot interface appears on the screen, release all the buttons.

Now Your Phone is in Fastboot Mode!