Blackberry Curve 8310 Unlocked Phone with GPS, 2MP Camera and Bluetooth - No Warranty - Red 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. 2G GSM: 850 / 900 / 1800 / 1900 QWERTY keyboard, Trackball navigation, Blackberry Maps, Document viewer (Word, Excel, PowerPoint, PDF), Media player (MP4/WMV/H.263/H.264/MP3/WAV/eAAC+/WMA), Organizer. Camera: 2 MP, 1600x1200 pixels, LED flash. Internal Memory: 64 MB ROM, MicroSD expandable (4 GB max).