Dear smart phon user dnt buy oppoa57 mobile.becase this phon is very slow work.and this mobile fitchar is no esy and sytem useing is very hard.this mobile camra qwality is very ved.but selfee camra is very batter.this mobile selfeee is very good.oppo a57 battry bacup is veryvery good.but internet speed is very slow.oppo a57 mobile prosser is very slow work in mobile.altra slim set mobile looking is beautifull but clour is no beautifull.oppo a57 mobile sound is so sweet and talking voice very clean.i thing no comfortable of user.dnt buy oppo a57 mobile.than u