Downgrading your from Android 12 (OxygenOS 12) back to Android 11 (OxygenOS 11)
If your phone is bootlooping, or if the local upgrade fails with "verification error," you need the . This is the factory tool OnePlus service centers use. It is the nuclear option. downgrade oneplus 9 to android 11 exclusive
If you are reading this, you are likely part of that group. You want the original, fast, stable, and battery-efficient experience back. You want to . Downgrading your from Android 12 (OxygenOS 12) back
The OnePlus 9 series was launched with Android 11 out of the box, and later received updates to Android 12. However, if you're looking to downgrade your OnePlus 9 to Android 11, we've got you covered. In this guide, we'll walk you through the process of downgrading your device to Android 11. Backup everything (OnePlus Switch + Google Drive +
| Error Message | Solution | | :--- | :--- | | "Verification failed" | You are trying to downgrade from Android 13 directly to Android 11. You must first flash the (OxygenOS 12), then repeat for Android 11. | | "USB Device not recognized" in MSM | You need the Qualcomm 9008 drivers . Download them, then go to Device Manager > Right-click the unknown device > Update driver > Select "Qualcomm HS-USB QDLoader 9008." | | Bootloop after downgrade | Boot into recovery (Power + Volume Down) and perform a "Format Data" (type "yes"). The downgrade often corrupts user data partitions. | | Fingerprint sensor not working | Your persist partition is mismatched. Re-flash the Android 11 firmware via MSM tool again, but this time check "Reset fingerprint" in the tool options. |