Jiake Unlocked G6 Quadband Dual SIM Android 4.2 OS with 5.5 Inch Touch Screen Smart Phone For GSM Networks (Blue) 3G smartphone, Android 4.2.2 1.2G Dual Core, Dual SIM 5.5 inch touch screen Memory: ROM 4G RAM 512M Support GPS,WIFI,Bluetooth,Gravity Sensor 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.