Download the official OnePlus 9 Android 11 Rollback Package for your region. If the file ends in .jar , rename it to end in .
In the Local Update app/menu, select the zip file and confirm the installation. Once the progress reaches 100%, tap . Downgrade Oneplus 9 To Android 11
Download the official OnePlus 9 Android 11 Rollback Package for your region. If the file ends in .jar , rename it to end in .
In the Local Update app/menu, select the zip file and confirm the installation. Once the progress reaches 100%, tap .