Lenovo A3900 official Pictures. Lenovo A3900 is a Smartphone of lenovo. The Lenovo A3900 Android Smartphone. Announced May 2015. Features 5.0″ Display, MT6752 Chipset, 5 MP Primary Camera, 2 MP Front Camera, 2300 MAh Battery, 4 GB Storage, 512 MB RAM. Lenovo A3900 price starts.