Full Specification Celkon A21 Network : 2G/3G Launch : 2014 SIM : Dual SIM (Dual stand-by) Screen Display : 4.0 inches, Capacitive touchscreen, 320 x 480 pixels OS : Android 4.2.2 Jelly Bean Chipset : Mediatek MT6582 CPU : Cortex-A7 Quad-core 1.3 GHz…