How To Use Secret Codes On Oppo A9 2020 Upd [TOP]

OPPO uses a custom skin called . In newer updates (ColorOS 7, 11, or 12), OPPO has disabled many generic Android codes for security reasons.

*#899# – Remember it, bookmark it, use it monthly to monitor your phone's health. how to use secret codes on oppo a9 2020 upd