Given the complexity and the "blank screen" behavior, many advanced users prefer an alternative route: or using OPPO’s official flashing tool (like MSM Download Tool) for deep-level repairs. However, for the specific purpose of opening Fastboot, the ADB method remains the only viable path.
Because OPPO requires you to first. On the OPPO A5 2020, even in Fastboot mode, the command fastboot flashing unlock will fail with a "remote: Permission denied" error unless you have completed the Deep Test APK approval process. How to Open Fastboot Mode on OPPO A5 2020
A: OPPO did not release an official Android 12 update for the A5 2020. If you are running a custom ROM, the method may vary. Stick to ColorOS 9 or 10 for reliable Fastboot. Given the complexity and the "blank screen" behavior,