Cingular Wireless is the largest wireless carrier in the United States, serving 58.7 million customers. Cingular, a joint venture between AT&T Inc. (NYSE: T) and BellSouth Corporation (NYSE: BLS), has the largest digital voice and data network in the nation - the ALLOVER™ network - and the largest mobile-to-mobile community of any national wireless carrier. Cingular is a leader in third generation wireless technology. Its 3G network is the first widely available service in the world to use HSDPA (High Speed Downlink Packet Access) technology. Cingular is the only U.S. wireless carrier to offer Rollover®, the wireless plan that lets customers keep their unused monthly minutes.