Lenovo A3690 official Pictures. Lenovo A3690 is a Smartphone of lenovo. The Lenovo A3690 Android Smartphone. Announced Oct 2015. Features 5.0″ Display, MT6735P Chipset, 8 MP Primary Camera, 2 MP Front Camera, 2300 MAh Battery, 8 GB Storage, 1000 MB RAM. Lenovo A3690 price starts.