how to install android 12 on rog phone 3?

[iglesiasf70]

I have the official firmware downloaded from the Asus website, I would like to know how to update it, I have Android 11

[Mostwanted]

That's the simplest way to update or downgrade to any version.

Another method is to root you device and then update downgrade 

[iglesiasf70]

Where do I get the Android 12 firmware?

[Falcon_ASUS]

@iglesiasf70 
We would like to inform you that we no longer provide previous firmware versions or downgraded software packages on ASUS official website. This is to ensure that the security updates on your phone remain up-to-date with the latest firmware versions. We appreciate your understanding and patience. If you have any question or need assistance, please feel free to visit our service center or call the service hot line, we will do our best to provide help for your questions. 

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.

[iglesiasf70]

Hello, I want to download the latest version of my cell phone that supports Android, I want to install Android 12, and I can't find the firmware because it was removed from the official Asus website, where can I find it, I don't want to install an outdated version

[Mostwanted]

You can download the .272 zip file from Asus official ROG 3 Support section. There are more updates released but Asus didn't uploaded them yet.