Oppo A57 has 3 gb ram and good internal memory also bt battery back up is too low and it cant used a day full hardly . performance wise oppo A57 is mainly made for photography not more than that it gets lag sometime but camera quality is too good front and rear is 13 and 16 mp and wisely crafted body but design is same as old oppo boring and it has 1.4 ghz processor but also performance is nt gud compare to mi and prize is also an draw back of this mobile it coasts more and it doesnt give the feel of using a 3gb ram phone and 4g netwrk speed is also not good