What is your phone running right now? AI responses may include mistakes. Learn more
Carrier-locked versions (like T-Mobile) often cannot use this local update method. You may need to use the MSMDownloadTool on a PC to force a downgrade. Share public link
Find the official rollback package (a .zip file) for your specific regional OnePlus 9 model from the OnePlus Community Forums . Downgrade Oneplus 9 To Android 11
Before proceeding, you must understand the risks involved in switching to an older operating system.
(eFuses) that can hard-brick a device if you attempt to go back to older versions. How to Perform the Downgrade Oneplus 9 Pro | Downgrade to OXYGEN OS 11 What is your phone running right now
Note: You may need to rename the file extension to .apk if it appears as .zip in your file manager. Step 3: Performing the Downgrade Open the . Tap on the Gear icon in the top-right corner.
Before proceeding, you must understand the risks involved in flashing firmware. You may need to use the MSMDownloadTool on
Once the device reboots to the setup screen, go through the initial setup. Your phone is now officially back on Android 11. Why People Downgrade the OnePlus 9 to Android 11
Downgrade OnePlus 9 to Android 11: Comprehensive Step-by-Step Guide
If you want, I can produce a step-by-step, model-specific guide for your exact OnePlus 9 variant (including exact commands and filenames) — tell me your model number (from Settings → About phone) and whether your bootloader is unlocked.
But he was a curious guy. He tapped Install .