Following the OTA deployment, users of the CPH1931 reported several persistent issues that OnePlus (due to the device reaching end-of-life):

before starting any update process to prevent accidental loss. Prizm Institute Further Exploration Learn how to perform a full diagnostic test on your OPPO device using hidden codes. video walkthrough for recovery mode to manually install firmware without a PC. official specifications for the to see the latest supported Android version. specifically to the OPPO Cloud before you update? Update software – OPPO A5 (2020) - Android 10 Guide