Xiaomi Mi Max 4 Pro official Pictures. Xiaomi Mi Max 4 Pro is a Smartphone of xiaomi. The Xiaomi Mi Max 4 Pro Android Smartphone. Not Announced Yet. Features 7.2″ Display Snapdragon 675 Chipset 5800 MAh Battery 128 GB Storage 8 GB RAM Corning Gorilla Glass 5. Xiaomi Mi Max 4 Pro price starts.