Acer Iconia Tab A3-A20 official Pictures. Acer Iconia Tab A3-A20 is a Smartphone of acer. The Acer Iconia Tab A3-A20 Android Tablet. Announced Oct 2014. Features 10.1″ Display, MT8127 Chipset, 5 MP Primary Camera, 2 MP Front Camera, 5910 MAh Battery, 16 GB Storage, 1000 MB RAM, Corning Gorilla Glass 4. Acer Iconia Tab A3-A20 price starts.