Epix 4.5 Guru GSM Unlocked 4G Android Smartphone 4.5" Display Dual SIM Dual Core 5MP Camera Cell Phone powered by Sky - USA Warranty 4.5" LCD Capacitive Touch-Panel Display. FWVGA 480*854. Enhanced 4G HSDPA+ Network Support. Powerful Dual Core 1.2 GHz Processor & 5.0 MP Rear Camera + 1.3 MP Front Camera 4GHSPA+ 21 Mbps 850/1700/1900: Nationwide AT&T: Cricket Wireless, Tracfone, 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. Android 4.4 "KitKat" OS with 512MB RAM & SD Card Support. (up to 32GB SD Card). 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.