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 (White) White color Unlocked 4 inch SD-401 White Smart Phone Android 2.3 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.