BLU Studio 5.0 II Unlocked Cellphone, Black Unlocked Dual SIM Phone, MediaTek Dual Core 1.3 GHz Processor, 5MP Main Camera VGA Front 5.0" IPS High Resolution WVGA Display with Android 4.2 Jelly Bean 3.5 mm Audio Jack, FM Radio, MP3 Player, MP4 Player Micro SD Slot up to 32GB 4G HSPA + 21Mbps 850/1700/1900: Nationwide AT&T: Cricket Wireless, Straight Talk, Net10, H20 Wireless, 420 Wireless, Black Wireless, Consumer Cellular, Pure TalkUSA, Red Pocket, Telcel America. T-Mobile: MetroPCS, Lyca, Speedtalk, Go Smart, Simple Mobile, Net10, Straight Talk, Solavei, Ultra Mobile, Telcel America, Walmart Family Mobile. 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.