with the help of this firmware you can solve all software Issues on your Oppo A15s such as hang on Logo, frp lock, Fastboot Mode, display Blank or White after Flash, dead recovery, dead after flash etc. Official Stock Firmware Flash File Now available for the Oppo A15s & You can download it from below. 1.4 How to Install Stock Firmware on Oppo A15s: Oppo A15s CPH2179 Flash File Free Download: