Sony Ericsson Z555a Diamond Black phone (Unlocked, US Version) with Full US Warranty 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 U.S.tri-band GSM cell phone compatible with 850/1800/1900 frequencies and GPRS/EDGE data capabilities Designer clamshell phone with unique diamond reflective finish on the front and gesture controls for muting calls, snoozing alarm 1.3-megapixel camera/camcorder; Bluetoth music streaming; Memory Stick Micro expansion (up to 4 GB); web browser with RSS feeds Up to 7 hours of talk time, up to 300 hours (12.5 days) of standby time