According to Reuters sources, AT&T Wireless is planning to introduce a high-speed Internet service for cell phones in certain U.S. markets this summer.

As early as mid to late July its third-generation, or "3G," mobile phone service that is capable of transmitting not just voice and simple text messages but also pictures, video and hefty e-mail attachments will be available to AT&T Wireless customers.

The network upgrade is designed to replace its older network that was largely used for digital voice calling and pits the company against U.S. mobile leader Verizon Wireless.
http://www.mobilemag.com/content/100/104/C2905/