Samsung i320 Unlocked Phone with Windows Mobile 5.0, Camera, MP3/Video Player, and MicroSD Slot-International Version with 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. Tri-band GSM cell phone compatible with 900/1800/1900 frequencies and GPRS/EDGE capabilities Full QWERTY keyboard and 2.2-inch TFT screen; Windows Mobile 5.0 operating system; access to personal and corporate email 1.3-megapixel camera/camcorder; digital audio player; MicroSD memory expansion; Bluetooth stereo music Up to 3.5 hours of talk time, up to 140 hours ( 5.8 days) of standby time