Oppo A57 is not a good phone optiln to buy because there are many disadvantage of this mobile , about its quality and design . I don’t like the body and physical overview they should improve the battery quality should improve and not much good physical contents it’s also also have hybrid Sim which is not good according to me it should be dedicated slot for SD card and its processor should have been MediaTek processor which is not good to work and it also has camera which is it is not quite good according to me so I don’t think to buy this phone to all of us you should have buy redmi note 4 not this redmi note 4 is better option to you buy as a phone