Nokia 5310 XpressMusic Unlocked Phone with 2 MP Camera, MP3/Video Player, MicroSD Slot--U.S. Version with Warranty (Blue) 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. U.S. version tri-band GSM cell phone compatible with 850/1800/1900 frequencies and GPRS/EDGE capabilities Dedicated music playback controls; Bluetooth stereo music; FM stereo; MicroSD expansion (up to 4 GB) 2-megapixel camera with video capture; personal email with document viewer; personal organizer Up to 5 hours of talk time, up to 300 hours (12.5 days) of standby time Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk, and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.