Samsung Gravity 3 T479 Unlocked GSM Phone with 3G, QWERTY Keyboard, 2MP Camera, Bluetooth and Music Player - White/Green This unlocked cell phone is compatible with GSM carrier T-Mobile. Not all carrier features may be supported such as AT&T. 3G-enabled quick messaging phone with side-sliding QWERTY keyboard and dedicated shortcuts to messaging and social networks Compatible with T-Mobile's 3G network for fast downloads as well as quick uploads of photo and video to sharing sites 2.0-megapixel camera/camcorder, Bluetooth stereo music, microSD memory expansion to 16 GB, organizer tools, personal and work e-mail Up to 5.5 hours of talk time, up to 300 hours (12.5 days) of standby time, released in July, 2010