The Blackberry 8310 is slim in design and ideal for staying connected. Its standard full QWERTY keyboard makes e-mail, text messaging and instant messaging effortless. The 2 megapixel camera is also perfect for casual on the go picture taking. Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile; also compatible with GSM SIM cards like H20 and select prepaid carriers. Phone will not work with Sprint, Verizon, Boost Mobile, Virgin Wireless or other CDMA carriers. Please contact your carrier to confirm support of voice and data on this unlocked GSM device.