Earlier on when Asus ROG Phone II ZS660KL
was released we published a post to show our readers the features,
specifications and price of this most adorable Asus device called ROG Phone II
ZS660KL. As well as how you can perform a hard or soft reset when your ROG
Phone II ZS660KL becomes unresponsive or should you choose to give to someone
else with no data in it.

Usually, a hardor soft reset with the guide provided for Asus ROG Phone II ZS660KL is
supposed to fix any possible software issue you might be experiencing with your
Asus ROG Phone II ZS660KL or other similar android devices that the quick fixing guide for issues like camera, Bluetooth,SIM, Wi-Fi, YouTube or other malfunction could solve. But if you have
tried that already and it failed then, you should probably opt-in for
formatting in this case I will show you how to use Android Flash Tool to format
your ROG Phone II ZS660KL.

Steps on how to flash Asus ROG Phone II ZS660KL with A
Flash Tool:

·        
Download
the stock ROM of Asus ROG Phone II ZS660KL.

·        
As usual you need to place your
phone on charge till it is charged not less than 50 percent before you process
else you phone might not wake up even after formatting.

·        
Next you will have to follow
the instruction of using a Firmware
Flashing or Upgrade Tool as explainedhere.

Stock Firmware

·        
Stock Firmware flashing can be
applied to Unbrick your Asus ROG Phone II ZS660KL

·        
Stock ROM flashing can be
applied to fix Bootloop issues.

·        
Stock Firmware flashing can be
applied to either upgrade or downgrade your Asus ROG Phone II ZS660KL

·        
It can be applied to unroot or
fix bugs on your Asus ROG Phone II ZS660KL.

·        
To fix stutter or lag on your Asus
ROG Phone II ZS660KL

·        
Stock firmware flashing is
effective in solving software issues of Asus ROG Phone II ZS660KL.

·        
Stock firmware flashing can be
applied to revert back to the stock of your Asus ROG Phone II ZS660KL to gain
your warranty.

Just before you follow the tips below to upgrade or
downgrade your Asus ROG Phone II ZS660KL. Do a backup of your personal data:

·        
Setup an
auto or carry out a manual backup regularly of your Asus ROG Phone II ZS660KL
following our guide here with
data or Wi-Fi connection.

·        
You can
also backup
your Asus ROG Phone II ZS660KL offline – without internet connection
following the steps provided here.

Tips to
Remember:

i.                    
This
update is meant for Asus ROG Phone II ZS660KL users only.

ii.                  
Be sure
to try the other method of installing stock firmware if
yours have unlocked Bootloader issue.

iii.                 
TWRP
Recovery is a good alternative on how to upgrade your device if you don’t want
to do it the normal way. Here is a post on TWRP
Recovery.

iv.                
THEUPSPOT
is in no way responsible for any damage you might have on your Asus ROG Phone
II ZS660KL while installing the update.

v.                  
The usual upgrade steps require the use of PC or Laptop to carry out the firmware
flashing.

vi.                
Ensure
that you have an updated and working USB drivers installed.

To request for download link, simply drop your
email in the comment box below.