Downgrade Oneplus 9 To Android 11 [patched] -

Once your phone is back on Android 11, there are a few things to consider:

OnePlus officially provides "Rollback Builds" (downgrade packages) for users who want to revert from beta or stable Android 12/13/14 to Android 11.

: Navigate to Settings > About Phone > Version . Then, tap on Build Number 5-7 times until "You are now a developer!" appears. Return to Settings > System > Developer options and enable USB debugging .

Then, the OnePlus boot logo appeared. Not the new ColorOS one. The old, familiar, reassuring logo. Downgrade Oneplus 9 To Android 11

Corrupted cache partition. Fix:

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.

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. Once your phone is back on Android 11,

Downgrading will wipe all data on your phone. Please read the prerequisites carefully before proceeding.

Save all photos, contacts, and files to a PC or cloud service. Battery: Ensure your phone has at least 50% charge .

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Return to Settings > System > Developer options

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

Downgrading your OnePlus 9 to Android 11 successfully restores the clean, fast, and highly-praised OxygenOS 11 user experience. While it requires careful attention to detail and a complete data wipe, following these steps ensures a smooth transition backward. Enjoy your restored battery life, stable performance, and preferred user interface! If you hit a snag during the process, let me know:

Connect your OnePlus 9 to a computer via a USB cable. Select File Transfer on your phone notification panel, then copy your DCIM , Pictures , Downloads , and Documents folders to your computer.

If you're missing the stability or features of earlier OxygenOS versions, you can downgrade your Go to product viewer dialog for this item.

This comprehensive guide provides a step-by-step walkthrough to safely roll back your OnePlus 9 to Android 11. Pre-Downgrade Checklist