BLU Dash C Music-US GSM - Unlocked Cell Phone (Black) Unlocked Dual SIM Phone, MediaTek Dual core 1.0 GHz with Mali 400 GPU, Android v4.4 Kit Kat 3.2MP LED Flash with VGA front camera 4GB Internal Memory with 512MB RAM 3.5 mm Audio Jack, FM Radio, MP3 Player, MP4 Player Micro SD Slot up to 64GB GSM Quad Band, 3G/4G HSPA+ (850/1700/1900): US Compatibility Nationwide on all GSM Networks including AT&T, T-Mobile, Cricket, MetroPCS, Straight Talk, Pure Talk USa and others 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, Pure Talk USA and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.