Samsung Galaxy Mega I9152 5.8" Android Smart Phone (Unlocked) - Black, Dual-core 1.4 GHz, Dual Camera with Flash (8MP/1.9 MP), Dual SIMs Quad Bands Global 3G Support, HSPDA 850/900/1900/2100 MHz 5.8 Inches Extremely Large Screen Dual Camera with Flash LED (8MP/1.9 MP), Geo-tagging, Touch Focus, Face and Smile Detection Dual-core 1.4 GHz, 1.5G RAM, 8GB Storage (Up to 64 GB) Dual SIM Card Slot, Android OS, v4.2.2 (Jelly Bean), WIFI, GPS 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.