Samsung i900 Omnia Unlocked Phone with 8 GB Memory, 5 MP Camera, GPS, Wi-Fi, Windows Mobile 6.1, and MicroSD Slot--International Version No Warranty (Black) This unlocked cell phone is compatible with GSM carriers like AT&T and T-Mobile. Not all carrier features may be supported. It will not work with CDMA carriers like Verizon Wireless, Alltel and Sprint. Quad-band GSM cell phone compatible with 850/900/1800/1900 frequencies and International 3G compatibility via 2100 UMTS/HSDPA plus GPRS/EDGE capabilities Touchscreen-enabled smartphone with 8 GB internal memory, 3.2-inch LCD, intuitive TouchWiz interface, and Windows Mobile 6.1 5-megapixel camera/camcorder; Wi-Fi networking (802.11g/b); GPS for navigation and geo-tagging; Bluetooth stereo music Up to 5.8 hours of talk time, up to 500 hours (20+ days) of standby time This cell phone may not include a US warranty as some manufacturers do not honor warranties for international version phones. Please contact the seller for specific warranty information.