SamsungBlackJackII1617 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 Quad-band/3G smartphone with Windows Mobile 6 for MS Office document editing and easy Outlook email and contacts Internal GPS receiver with support for TeleNav software; music and video downloads and streams via AT&T Mobile Music and Cellular Video Full QWERTY keyboard; Bluetooth stereo music streaming; 2.0 megapixel camera; MicroSD expansion Up to 7 hours of talk time, up to 14 days of standby time This unlocked cell phone is compatible with GSM carriers like AT&T and T-Mobile. Not all carrier features may be supported. Quad-band/3G smartphone with Windows Mobile 6 for MS Office document editing and easy Outlook email and contacts Internal GPS receiver with support for TeleNav software; music and video downloads and streams via AT&T Mobile Music and Cellular Video Full QWERTY keyboard; Bluetooth stereo music streaming; 2.0 megapixel camera; MicroSD expansion Up to 7 hours of talk time, up to 14 days of standby time It will not work with CDMA carriers like Verizon Wireless, Alltel and Sprint