Unnecto Quattro X Smartphone - Unlocked (White) Unlocked Dual SIM Phone, Dual Core 1.2 GHz Processor, 5MP Main Camera 1.0 MP Front camera, LED Flash High Dynamic Range (HDR) Photos, Face/Smile Detection, Panorama Capable 4.0" HVGA IPS Capacitive Touch screen 4G HSPA + 21Mbps GSM 850/900/1800/1900 HSDPA 850 / 1900/2100 Nationwide AT&T: Cricket Wireless, Tracfone, Straight Talk, Net 10, H20 Wireless, 420 Wireless, Black Wireless, Consumer Cellular Pure , Red Pocket, Telcel America. T-Mobile: , Lyca, Speed talk, Go Smart, Simple Mobile, Net 10, Straight Talk, Solavei, Ultra Mobile, Telcel America, Walmart Family Mobile. Pure 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.