Oppo U3 official Pictures. Oppo U3 is a Smartphone of oppo. The Oppo U3 Android Smartphone. Announced Jan 2015. Features 5.9″ Display, MT6752 Chipset, 13 MP Primary Camera, 5 MP Front Camera, 3000 MAh Battery, 16 GB Storage, 2 GB RAM. Oppo U3 price starts.