Why users consider downgrading
Move your downloaded Android 11 rollback .zip file to the root directory of your phone storage. Open the newly installed app. Tap the Gear Icon in the top right corner.
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This process will completely wipe all data from your phone, including photos, apps, and contacts. Backup your data to a computer or cloud storage immediately.
To downgrade your to Android 11 (OxygenOS 11), you must use a specific rollback package. This process will erase all data on your device , so a full backup is essential before starting. Critical Pre-Downgrade Checklist Backup Data Downgrade Oneplus 9 To Android 11
Complete the Android 11 setup wizard (language selection, Wi-Fi login, etc.).
The first boot into Android 11 can take . Do not force restart. The phone will eventually show the Android 11 setup wizard.
Confirm the installation and let the system process the package. Step 4: Finalizing the Installation
fastboot flash boot boot.img fastboot flash dtbo dtbo.img fastboot flash vendor vendor.img fastboot flash system system.img fastboot flash userdata userdata.img # Wipes data fastboot flash vbmeta vbmeta.img --disable-verity --disable-verification fastboot -w fastboot reboot Why users consider downgrading Move your downloaded Android
provided by OnePlus specifically for downgrading from Android 12.
, keyboard calibration, and haptic feedback that some users found "broken" in newer updates. Cons: The Risks Data Wipe: mandatory factory reset . You must back up everything externally before starting. Security Risks:
Tap or Upgrade . The phone will reboot into recovery mode and begin installing Android 11.
Ensure your two-factor authentication (2FA) apps are backed up or temporarily disabled so you do not get locked out of your accounts after the reset. 2. Verify Your Device Model This public link is valid for 7 days
If running OxygenOS 12/13:
Note: Ensure the file extension ends in .zip . If your browser renames it to .jar , rename the file extension back to .zip using a file manager app. Step 2: Enable Developer Options
Install the OnePlus Local Update APK. If it downloads as a .zip , rename it to .apk to install it. Open the installed Local Update app . Tap the gear icon in the top right corner.
Prerequisites and preparatory steps