Basically Oppo F1s is a camera phone with primary camera 13mp and secondary camera with amazing 16mp. I personally use Oppo F1s.It is a very good mobile in 20k range. it has a very good sound quality and the style and design of the mobile is just WOW. 5.5inch HD display gives you better performance while watching HD Movies or playing high resolution games. finger Print Sensor works very smoothly. im usig this mobile since last 3 months it does not have heating problem. I can find it that this mobile is best for selfie camera phone. this mobile is worth buying it. I LOVE THIS MOBILE.