Samsung I321N Unlocked Cell Phone with 1.3 MP Camera, MicroSD memory expansion, Media Player--U.S. International Version with out 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. Unlocked tri-band GSM cell phone compatible with 900/1800/1900 frequencies and GPRS/EDGE data capabilities Business-oriented smartphone with Windows Mobile 5, full QWERTY keyboard; connect to corporate and personal email; 1.3-megapixel camera/camcorder; digital audio player; MicroSD memory expansion; Bluetooth handsfree communication and stereo music streaming Up to 3 hours of talk time, up to 130 hours (5.4 days) of standby time