Xiaomi Mi 4s official Pictures. Xiaomi Mi 4s is a Smartphone of xiaomi. The Xiaomi Mi 4s Android Smartphone. Announced Feb 2016. Features 5.0″ Display Snapdragon 808 Chipset 13 MP Primary Camera 5 MP Front Camera 3260 MAh Battery 64 GB Storage 3 GB RAM. Xiaomi Mi 4s price starts.