HTC Touch Dual P5520 Unlocked Phone with Windows Mobile 6.0, 2 MP Camera, International 3G, MP3/Video Player, and MicroSD Slot-International Version with No 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. Tri-band GSM cell phone compatible with 900/1800/1900 frequencies and International 3G compatibility via 2100 UMTS/HSDPA plus GPRS/EDGE capabilities Windows Mobile 6.0 operating system with enhanced business and enterprise tools; slider phone with touchscreen 2.0-megapixel digital camera with macro mode; MicroSD memory expansion; Bluetooth stereo music Up to 5 hours of talk time and 180 hours of standby