Download the specific rollback .zip file from the link above. Move to Storage:
No. This exclusive package only works if your phone is running an official OPPO ColorOS 11 build. If you have a custom ROM, you must first flash stock ColorOS 11 via EDL mode (service center required).
Power off your device completely. Press and hold the and Volume Down button simultaneously until the Oppo logo appears. Select your preferred language (English). Step 4: Install the Firmware
After the installation, perform a wipe data/factory reset to ensure a clean install. Reboot the device. Conclusion
: Press and hold the power button until the system shuts down completely.
A rollback package (often called a "downgrade firmware") is an official, signed system file released by OPPO that allows you to revert your smartphone from a newer version of ColorOS (e.g., Android 11/ColorOS 11) back to an older, more stable version (e.g., Android 10/ColorOS 10 or Android 9/ColorOS 6).
Downgrading firmware is a structural alteration to your device's core partitions. To prevent a permanent brick or data loss, verify the following prerequisites:
A rollback completely erases all user data , including photos, contacts, app data, and local files. Sync your data to a cloud provider or copy it to an external PC. Battery Charge Threshold:
Download the specific rollback .zip file from the link above. Move to Storage:
No. This exclusive package only works if your phone is running an official OPPO ColorOS 11 build. If you have a custom ROM, you must first flash stock ColorOS 11 via EDL mode (service center required).
Power off your device completely. Press and hold the and Volume Down button simultaneously until the Oppo logo appears. Select your preferred language (English). Step 4: Install the Firmware oppo a9 2020 rollback package exclusive
After the installation, perform a wipe data/factory reset to ensure a clean install. Reboot the device. Conclusion
: Press and hold the power button until the system shuts down completely. Download the specific rollback
A rollback package (often called a "downgrade firmware") is an official, signed system file released by OPPO that allows you to revert your smartphone from a newer version of ColorOS (e.g., Android 11/ColorOS 11) back to an older, more stable version (e.g., Android 10/ColorOS 10 or Android 9/ColorOS 6).
Downgrading firmware is a structural alteration to your device's core partitions. To prevent a permanent brick or data loss, verify the following prerequisites: If you have a custom ROM, you must
A rollback completely erases all user data , including photos, contacts, app data, and local files. Sync your data to a cloud provider or copy it to an external PC. Battery Charge Threshold: