Generic Unlocked Quadband 2 Sim with Android 2.3 Os (Android 4.1 Ui) Smart Phone 4.0 Inch Capacitive Touch Screen Compatible with GSM Carriers T-mobile Simple Mobile (Blue) UNLOCKED 2G Android 4.1 Mobile Smart Global Phone Works with GSM carriers. Powerfull MTK-6515 1ghz CPU 512MB ROM + 256MB RAM Dual camera (3mp main back camera) Enjoy your favourite Android apps 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.