Sometimes, "downgrade" is actually an upgrade. Just remember to back up your data first.
: Once the rollback zip is downloaded, move it to the root directory of your phone's internal storage (do not put it in a folder).
The OnePlus 9 series was launched with Android 11 out of the box, and later received updates to Android 12 and even Android 13. However, there may be reasons why you want to downgrade your OnePlus 9 to Android 11. Perhaps you're experiencing issues with the newer version, or you prefer the familiarity of Android 11. Whatever the reason, downgrading your device can be a bit tricky, but it's doable. In this article, we'll walk you through the process.
Ensure your device has at least 50% battery to prevent it from shutting down during the installation. Downgrade Oneplus 9 To Android 11
Downgrade any Oneplus Phone from OxygenOS 13 to Stable OxygenOS 12
Tap the 7 times rapidly until a toast notification says, "You are now a developer." Step 4: Flash the Android 11 Firmware
Do you have a unique error while trying to downgrade? Check the OnePlus Community forums or XDA Developers for device-specific rollback threads updated for your exact build number. Sometimes, "downgrade" is actually an upgrade
Go to Settings > Apps > App Management > Show System Apps > Search for "IMS" > Clear Data & Cache. Restart.
A severe warning prompt will appear on your screen, explicitly stating that this installation will wipe all data on your device. Confirm your choice by tapping or Confirm .
Download the specific rollback package for your region (IN, NA, or Europe). The OnePlus 9 series was launched with Android
: The system will warn you that this will reset the device. Tap Confirm .
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.
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