Oppo a 57 is very good smart phone it’s good condition oppo future 16mp front camera 13 MP rear camera 32gb rom 3gb ram hd video calling HD display 5.20 touch display this is a very good fone oppo company all mobile fone is very good chipset is very good back cover is free internet is fast heavy game support oppo is very good fone 1.4 ghz Octa core processor os Android 6.0.1 2900mh battery is it’s future is very good this Mobil is good slim fingerprints are very fast flashlight is very good I’m running a mobile of May oppo, I feel great I want to say that Mobil is very good