First of all the thing is that the operating system of oppo f1 s is look like apple. And battery backup of this mobile is very good and when I plug my oppo f1 s it suddnely charged in much time. I am realy shocked for its camera result. The result of back camera is 16 megapixel and front cameras result is 8 mega pixel. The ram of this mobile is 3 gb and all of the application will be eassily installed ant easilly opered in much time period. I have been use my oppo f1 s since 3months. At this time in our country oppo f1 s is more suitable for a buissness men and college boy can use this phone as a selfi expert.