Xiaomi Redmi Note 4 (MediaTek) official Pictures. Xiaomi Redmi Note 4 (MediaTek) is a Smartphone of xiaomi. The Xiaomi Redmi Note 4 (MediaTek) Android Smartphone. Announced Aug 2016. Features 5.5″ Display, MT6797 Helio X20 Chipset, 13 MP Primary Camera, 5 MP Front Camera, 4100 MAh Battery, 64 GB Storage, 4 GB RAM. Xiaomi Redmi Note 4 (MediaTek) price starts.