Sony Ericsson Z310a Unlocked Cell Phone-U.S. Version with Warranty (Jetset 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. U.S. tri-band GSM 900/1800/1900 cell phone with EDGE data capabilities Stylish mirrored front clamshell with unique hidden external LCD and disappearing icons for battery and signal strength, message status VGA camera for still photos; Bluetooth for handsfree devices; access to mobile email; web browser with RSS feeds; organizer Up to 7 hours of talk time, up to 300 hours ( 12.5 days) of standby time