BLU Dash JR D140 Unlocked Dual Sim Phone (Yellow) Unlocked Dual SIM 3.5-Inch High Resolution HVGA Display, 1 GHz Processor GSM-GPRS-EDGE 2G 850/900/1800/2100 2MP Camera, Android 2.3 Gingerbread, 512MB ROM-256MB RAM 3.5mm Audio Jack, FM Radio, MP3 Player, MP4 Player 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.