JIAKE N7100W 5.3 Inch Big Touch Screen Dual Core Unlocked 3G Smartphone with Dual Camera Dual SIM (Black) 3G smartphone, 5.3 inch WVGA capacitive (2-point) multitouch Screen Android 4.2; 4GB ROM 512MB RAM CPU: MTK6572W Cortex-A7 Dual Core 1.3GHz; GPU: Mali-400 MP Dual SIM, dual cameras Support WIFI, bluetooth, GPS, FM radio Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk, and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.