Downgrade Oneplus 9 To Android 11 Today

Downgrading OnePlus 9 to Android 11: A Step-by-Step Guide

While the OnePlus 9 initially received praise for its flagship performance, many users eventually found that newer updates—specifically Android 12 and 13—introduced bugs, battery drain, or UI changes that felt less "OxygenOS" and more like Oppo's ColorOS. If you're missing the stability and sleekness of the original software, this guide will walk you through how to downgrade your OnePlus 9 to Android 11 (OxygenOS 11). Important: Read Before Proceeding Downgrade Oneplus 9 To Android 11

Step 3: Access Local Upgrade

No, if:

Battery Level: Ensure your device has at least 30% battery to prevent it from shutting down mid-process. Downgrading OnePlus 9 to Android 11: A Step-by-Step

How to Downgrade Your OnePlus 9 to Android 11 (OxygenOS 11) If you've updated your OnePlus 9 to Android 12 or 13 and found it buggy or simply prefer the classic OxygenOS experience, you can roll back to Android 11. This process is official but will completely wipe your phone, so a full backup is essential before starting. Prerequisites Open Settings > System > System Updates

Step 3: Enable Local Upgrade

If running OxygenOS 12/13:

If you are on Android 12/13, the standard "Local Upgrade" option is often hidden.

  1. You won't receive OTA updates: Since you've downgraded, you won't receive official OTA updates for Android 12. You'll need to manually flash updates or wait for a new firmware release.
  2. Some features might not work: Certain features introduced in Android 12 might not work or be available on Android 11.
  3. Be cautious with future updates: If you decide to upgrade to Android 12 again in the future, make sure to check for any potential issues or bugs.