Oppo f1s is best smartphone . This mobile working is very best . This mobile size is 5.5 inches and the resolution is 720×1280 pixel . In the mobile 3gb ram and 32gb rom . The camera are 13 mp and 16 mp in this mobile .in this mobile non removable li - po 3075 mah bettary . This mobile bettary backup is very best and selfie camera is very best in this mobile.