HTC TyTN Unlocked PDA Smartphone with 2 MP Camera, 3G, Wi-Fi, MP3/Video Player, MicroSD Slot-U.S. Version with Warranty (Silver) 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 US 3G compatibility via 850/1900 UMTS/HSDPA plus GPRS/EDGE capabilities Windows Mobile 5.0 platform with enhanced business and enterprise tools; 2.8-inch touch-sensitive screen and slide-out QWERTY keyboard Wi-Fi networking (802.11b/g); 2-megapixel digital camera with macro mode; MicroSD memory expansion; Bluetooth stereo music Up to 5 hours of talk time, up to 200 hours (8+ days) of standby time