Blackberry Curve 8310 Unlocked Cell Phone This unlocked cell phone is compatible with GSM carriers like AT&T and T-Mobile. 2G GSM: 850 / 900 / 1800 / 1900 QWERTY keyboard, Trackball navigation, Blackberry Maps Camera: 2 MP, 1600x1200 pixels, LED flash. Document viewer (Word, Excel, PowerPoint, PDF), Media player (MP4/WMV/H.263/H.264/MP3/WAV/eAAC+/WMA), Organizer.