Oppo A57 is the best phone and Ram 3Gb and Rom32gb, 5.2 inch hd display and best camera 13 MP rear l 16 MP front is the best vedio recording and 2900mah battery and best processor snapdragon Qualcom MSM 8940 64bit proccessor with 2.1 ghz turbo boost technology use in thus phone with otg supportable phone.thanks!