Thank you for solving the problem

[Cigdem]

Did you send the downgrade software on the asus official website? I have repeatedly downgraded to android 9 with this software, but the system does not work on this android 9 da. camera, sound, network nothing works

[Falcon_ASUS]

@Cigdem
Yes, the file I provided to you is from our official website's download site, allowing users to downgrade their system back to Android P using the aforementioned method. If you continue to experience abnormal functionality with your phone, we recommend sending it for repair and further diagnosis. Sorry for any inconvenience it may be caused. 

[Cigdem]

I sent it to the Asus service,gave my phone to the Asus service.But they said that it is not allowed to download to android 9.

[Falcon_ASUS]

@Cigdem
Have you already sent your phone for repair again?
I have sent you another message, please provide your contact information through the message so that I can request the local service team to confirm and contact you. We apologize for any inconvenience this may cause.

[Cigdem · Accepted solution]

Thank you very much, my solution is solved thanks to you