HTC Touch Diamond 4 GB Unlocked Phone with 3G, 3.2 MP Camera, MP3/Video Player, and Windows Mobile 6.1-U.S. Version with 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 U.S. 3G compatibility via 850/1900 UMTS/HSDPA plus GPRS/EDGE data capabilities Windows Mobile 6.1 with TouchFLO 3D interface responds perfectly to your finger gestures when scrolling through contacts, browsing the web, and launching media Wi-Fi networking (802.11b/g); Bluetooth stereo music; GPS mapping and directions; 3.2-megapixel camera/camcorder; 4 GB of internal memory Up to 5.5 hours of talk time, up to 285 hours (11+ days) of standby time