Downgrade Oneplus 9 To Android 11 Jun 2026

: Move all important files, photos, and messages to external storage or a cloud service like Google Photos Battery Level : Ensure your phone has at least 50% charge to prevent it from shutting down mid-process. Correct Region

You need to find the specialized Android 11 rollback ZIP file for the OnePlus 9. These are usually found on the OnePlus Community Forum .

Once downloaded, move the rollback ZIP file from your "Downloads" folder to the root directory of your phone's internal storage (not inside any folders). If the file ends in or has extra characters, rename it to end simply in Initiate the Rollback: OnePlus Local Update app you installed. Settings (gear) icon in the top-right corner.

Move the downloaded file to the root directory of your phone's internal storage (do not leave it in the "Downloads" folder). Open the Local Update app you just installed. Tap the gear icon in the top-right corner. Downgrade Oneplus 9 To Android 11

On newer OxygenOS versions, the standard "Local Upgrade" option may be hidden. You might need to download and install the OnePlus Local Update APK to perform the manual install. Prepare the Files:

Once the progress bar reaches 100%, the application will prompt you to reboot your phone. Tap the button.

Find the downloaded rollback package in your "Downloads" folder. If it ends in rename it to Move the package to the root directory of your internal storage (outside of any folders). Install the Rollback: Local Update app you installed. in the top-right corner. : Move all important files, photos, and messages

: Go to Settings > About Device > Version and tap Build Number 7 times. Access Local Install :

It retains the distinct OxygenOS identity before the heavy integration with OPPO's ColorOS. Reliable Features: Fixed bugs related to Android Auto

Downgrading your Android 11 (OxygenOS 11) is a common move for users looking to escape bugs or performance issues in newer versions like OxygenOS 12 or 13 . This process will completely and irreversibly wipe all data Once downloaded, move the rollback ZIP file from

Before we dive into the process, let's discuss some reasons why you might want to downgrade to Android 11. Perhaps you:

Download the official OOS 11 downgrade ZIP for your region from OnePlus’s servers:

Downgrading your OnePlus 9 to Android 11 is a relatively straightforward process, but it does require some technical expertise and caution. If you're not comfortable with the process or encounter any issues, it's recommended to seek help from OnePlus support or a professional. However, if you're willing to take the necessary precautions, downgrading to Android 11 can provide a more stable and familiar experience.

. Your phone will restart into the setup screen for Android 11. Troubleshooting "Local Install" Missing