Sometimes, despite following the instructions, the phone refuses to enter recovery. Here are troubleshooting fixes:
When the "OPPO" logo appears on the screen, release the button but continue to hold the Volume Down button. Enter Recovery Mode How to Open Recovery Mode on OPPO F19 Pro
: Manually install a system update or firmware package from an SD card or internal storage. despite following the instructions
Press and hold the and Volume Down buttons at the same time. How to Open Recovery Mode on OPPO F19 Pro
: This is used for a hard reset . Choosing "Format Data" will erase all user files, photos, and settings, returning the device to its original factory state.