AT&T a joint venture between SBC Commaunications (NYSE - SBC) and BellSouth (NYSE - BLS), serves more than 25 million voice and data customers across the United States. A leader in mobile voice and data communications, AT&T is the only U.S. wireless carrier to offer RolloverSM, the wireless plan that lets customers keep their unused monthly minutes. AT&T has launched the world's first commercial deployment of wireless services using Enhanced Data rates for GSM Evolution (EDGE) technology. AT&T provides cellular/PCS service in 43 of the top 50 markets nationwide, and provides corporate e-mail and other advanced data services through its GPRS, EDGE and Mobitex packet data networks. Details of the company are available at http://www.wireless.att.com/home/