If you want early access to newer versions (like ColorOS 15), check the Trial versions section under the update settings menu. 2. Local Update/Recovery Mode
Download the official Oppo A78 firmware file for your region. Scatter File into the SP Flash Tool. Power off the phone, hold Volume Up/Down oppo a78 refurbished firmware
If you see “test-keys” or an unrecognized build date, the device has non-official firmware. If you want early access to newer versions
However, this process will wipe all data and may require unlocking the bootloader (which can trip security flags). For most users, the safest route is to: Scatter File into the SP Flash Tool
This is the safest method for refurbished devices to ensure they are on the latest official version. Via Settings: About device at the top to check for updates. Trial/Official Versions: In the same menu, you can tap the top right icon Trial versions Official version
Flashing refurbished firmware is not for everyone. You should stop and contact a professional technician if: