Samsung I600 Unlocked Cell Phone with Camera, International 3G, Wi-Fi, MP3/Video Player, MicroSD Slot--International Version with Warranty (Black) This unlocked cell phone is compatible with GSM carriers like AT&amp;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 Full QWERTY keyboard and 2.3-inch TFT screen; Windows Mobile 5.0 operating system; access to personal and corporate email Wi-Fi networking (802.11b/g); 1.3-megapixel camera/camcorder; digital audio player; MicroSD memory expansion; Bluetooth stereo music Up to 6.5 hours of talk time, up to 300 hours (12.5 days) of standby time