Samsung U100 Unlocked Cell Phone with 3 MP Camera, MP3/Video Player, MicroSD Slot--International Version with No Warranty (Sapphire Blue) 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 GPRS/EDGE capabilities 3-megapixel digital camera with 4x digital zoom and video capture; digital audio player; Bang &amp; Olufsen Ice Power digital amplification technology Bluetooth stereo music; MicroSD memory expansion; access to personal email; organizer; document viewer Up to 4.5 hours of talk time, up to 300 hours (12.5 days) of standby time