How to update ROG Phone 5s (ZS676KS) from Android 11 to last firmware version Android 13

[Trollfaceim]

How to update ROG Phone 5s (ZS676KS) from Android 11 (firmware version WW_18.1220.2111.164) to last firmware version Android 13 (WW-33.0210.0210.200) 

I've tried a lot versions for update, but still having a problem with 'System update failed'

[DFSJbbba5]

It seems to become able to dowload stock firmware for JP SKUs. Other SKU still disable to DL.

WW-33.0210.0210.201 for JP SKUs

[Trollfaceim]

Unfortunately, this option didn't work(

[DFSJbbba5]

@Trollfaceim 

First of all,you shall know your resion of your device.

Second, after visittig asus support site, iconfirm if there is firmware.

Third, if no, you should ask to asus the reason why firmware can't download.

To know the SKU, try to type the followings on terminal.

$ getprop | grep ship

[Falcon_ASUS]

@Trollfaceim 
Please confirm if your phone's firmware is used across different regions.
If not, please refer to the following method to update the firmware.
Tap "Check Update" in "Settings" -> "System update" to check if the firmware is the latest version.
Note: During the update process, please charge your phone with the AC adaptor or make sure the phone has at least 15% battery power level.

However, if you are unable to update, it is advisable to visit a repair center for further verification.
The following is the contact information:
https://www.asus.com/support/service-center-location 
Also you can contact the local service center for help.
The following is the contact information:
https://www.asus.com/support/CallUs# 
Sorry for any inconvenience it may be caused.