The first boot sequence back into Android 11 will take longer than usual (typically 5 to 10 minutes).
A: No. All official downgrade methods from OnePlus will completely wipe your device. There is no safe way to downgrade without a full data wipe. This is why a thorough backup is critical.
You downloaded the wrong regional build (e.g., EU package on an Indian device). Fix: Redownload the correct rollback package for your exact model (LE2111, LE2113, etc.). Check the file MD5 checksum. Downgrade Oneplus 9 To Android 11
Move this file to the of your phone's internal storage (do not put it in any folder). Enable Local Upgrade
Before proceeding, understand that flashing firmware carries inherent risks. Follow these preparations to avoid hard-bricking your device. The first boot sequence back into Android 11
Select the rollback package you just moved to the root storage. Confirm and Wipe:
Ensure your phone is charged to at least 70% . There is no safe way to downgrade without a full data wipe
Downgrading your OnePlus 9 to Android 11 is a complex process that requires careful attention to detail. While it's possible to revert to an older version, keep in mind that you may miss out on newer security patches, features, and bug fixes. Additionally, downgrading will void your warranty, and you may encounter issues with future software updates.
I can provide the specific utility tools or troubleshooting steps for your configuration. Share public link
from your device, so a full backup is essential before you begin. ⚠️ Critical Pre-Downgrade Requirements Backup Everything
The method to access the Local Upgrade menu varies depending on whether your OnePlus 9 is currently running Android 12 or Android 13. If Your Phone is on Android 12: Open > About Device > Software Update . Tap the Gear Icon in the top right corner. Select Local Upgrade . Tap on the Android 11 rollback zip file you moved earlier. Tap Install Now and confirm the data wipe. If Your Phone is on Android 13: