[Asus ROG Phone 6 / 6 Pro] zortheck:
Disclaimer: I’m not responsable of any lose data, or damage on your phone, proceed at your own risk.​

Note:

This methods were only tested in unrooted devices with locked bootloader and global firmware version.

Dear community, since Asus has stopped providing firmware for manual update (the latest firmware available on the Asus website is A14 241 which must be installed from build 177), some users were left without updates between 157 and 177, and now they're stuck on A13 build 157 or lower, without the possibility to upgrade from there. I'm glad to share with you some methods to update your device.

Method 1:

If you are in A13 157 or below you need to downgrade to A12 build 241 with this file:

4.13 GB file on MEGA

mega.nz

If you have traffic download problems with mega you can use a VPN or this other link

UL-ASUS_AI2201-ASUS-99.9999.9999.99-1.1.1-9999-user

MediaFire is a simple to use free service that lets you put all your photos, documents, music, and video in a single place so you can access them anywhere and share them everywhere.

www.mediafire.com

This is the official ASUS method to downgrade.

Important note: don’t try to downgrade from 159 or above, (risk of bootloop), Asus has block the ability to downgrade from that firmware and above, but don’t worry, go to method 2.

IMPORTANT: THIS WILL ERASE ALL YOUR DATA, DO A BACK UP OF ALL YOUR STUFF, GAMES & CONFIG.

Steps to downgrade:

1 Download the mega (or mediafire) file (4.13GB)

2 Remove your google acount from your device

3 Copy the dowloaded file to the internal storage of your phone like any other firmware update, the file will be automatically detected

4 Pull the quick settings list and tap on “firmware update detected” message, install and then restart

*If the file is not automatically detected, reboot the phone and the message will pop up.

Once you downgrade to A12 build 241, you need to upgrade to A13 159 with this file:

UL-ASUS_AI2201-ASUS-33.0610.2810.159-1.1.1-2307-user.zip

Install it, like any other normal OTA update.

Note: this file only works if you are on A12 241, don't try directly from 157 or any other A13 build, will give you an error message.

Method 2: (And the steps to follow once you're on A13 159)

If you are on build 159 you need to update to 166 with this file:

UL-ASUS_AI2201-ASUS-33.0610.2810.166-1.1.1-2310-user.zip

If you are on build 166 already, you need to update to 172 with this file:

UL-ASUS_AI2201-ASUS-33.0610.2810.172-1.1.1-2311-user.zip

Like there’s no way to go directly from 157 to 159, there’s no way to go from 172 to 177 so, once you are in build 172 you need to install all A14 beta files, from 120 to 220.

The A14 BETA files:

UL-ASUS_AI2201-ASUS-34.0210.0210.120-1.1.195-2312-user.zip

UL-ASUS_AI2201-ASUS-34.0210.0210.150-1.1.195-2312-user.zip

UL-ASUS_AI2201-ASUS-34.0210.0210.170-1.1.2-40545-user.zip

UL-ASUS_AI2201-ASUS-33.0610.2810.200-1.1.2-2401-user.zip

UL-ASUS_AI2201-ASUS-33.0610.2810.220-1.1.2-2401-user.zip

And then install this A14 241 Full Firmware file:

WW-34.0210.0210.241

If you are already on 177 just made the manual update with this file:

https://fota2.asus.com/delta_package/phone/WW_AI2201/formal/33.0610.2810.177-user-WW_AI2201-34.0210.0210.241-user-WW_AI2201-02200438-fota-usere3557f5a8f4/33.0610.2810.177-user-WW_AI2201-34.0210.0210.241-user-WW_AI2201-02200438-fota-usere3557f5a8f4.zip

Rename the file to:

UL-ASUS_AI2201-ASUS-34.0210.0210.241-1.1.1-2402-user.zip

and copy to internal storage for a manual update

Let me know if a link is down or missing.

Enjoy.

Special thanks to EnterPC for providing most OTA files