Xiaomi Mi 4 official Pictures. Xiaomi Mi 4 is a Smartphone of xiaomi. The Xiaomi Mi 4 Android Smartphone. Announced Jul 2014. Features 5.0″ Display, Snapdragon 801 Chipset, 13 MP Primary Camera, 8 MP Front Camera, 3080 MAh Battery, 64 GB Storage, 3 GB RAM. Xiaomi Mi 4 price starts.