: Connect your OPPO A9 2020 to your computer using a high-quality USB cable.
: Open a command prompt or terminal on your PC and type: adb reboot bootloader Your phone will automatically restart into Fastboot Mode. Important Considerations Fastboot Mode OPPO A9 2020 - HardReset.info How to Open Fastboot Mode on OPPO A9 2020
: Release the buttons as soon as the Fastboot Mode screen appears. Comparison with Recovery Mode : Connect your OPPO A9 2020 to your
| Symptom | Likely Cause | Solution | |---------|--------------|----------| | adb reboot bootloader boots to Android normally | OPPO’s bootloader intercepts the command | Cannot be fixed; OPPO blocks Fastboot by design | | Device shows "Fastboot" but fastboot devices shows nothing | Driver issues or OPPO’s stub Fastboot | Install Google USB drivers; still unlikely to work | | fastboot oem unlock returns remote: Command not allowed | Bootloader is locked | No official unlock available | | Device enters Recovery instead | Wrong command or OPPO’s override | Normal behavior on locked OPPO devices | Comparison with Recovery Mode | Symptom | Likely