3G, Wi-Fi, GPS, Media Player, MicroSD Slot--U.S. Version with Full U.S. Warranty. 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. U.S. version unlocked quad-band GSM cell phone compatible with 850/900/1800/1900 frequencies and US 3G compatibility via 850/1900 UMTS/HSDPA plus GPRS/EDGE data capabilities Access to corporate/personal email; QWERTY keyboard; Wi-Fi networking;Bluetooth stereo music; 2-megapixel camera/camcorder Up to 11 hours of talk time, up to 430 hours (18 days) of standby time What's in the Box: handset, battery, charger, wired headset, user and quick start guides