Company Overview: AT&T is currently the largest wireless carrier in the nation. AT&T formerly Cingular Wireless, uses a nationwide GSM network of cell towers and is roaming partners with T-Mobile, SunCom, and other GSM providers operating GSM systems. Cingular has more than 78.2 million (July 09) subscribers in the U.S. The company is headquartered in Atlanta, GA.
Following AT&T's merger with BellSouth in December 2006, Cingular Wireless is now solely owned by AT&T.
Special Plan Features: Rollover service allows subscribers to carry unused minutes from month-to-month; Myriad monthly plans include free mobile-to-mobile and optional unlimited nights/weekends and family calling; Data services available for phones/PDAs, BlackBerry devices, and laptops; Pre-paid service available.
Unique Features: Rollover minutes; Downloadable games, ringtones, and other entertainment; "MEdia Net" mobile Internet service for phones; Only major GSM carrier with push-to-talk service.
Pros: Nationwide service coverage and monthly plans competitive with all major carriers; Rollover minutes provide added value; Extensive selection of data and entertainment add-ons; GSM network supports many phones.
Cons: Notable customer service complaints in wake of merger with AT&T Wireless in 2004.
Customer Service: See user reviews
Technology Used: Cingular Wireless operates nationwide GSM voice networks with GPRS and EDGE data services. Newly lauched "BroadbandConnect" UMTS/HSDPA high-speed network. Cingular also supports their legacy TDMA and analog networks, though they have recently announced these networks will be shut down in 2008.
Network Benefits: Nationwide coverage including high speed data services; Enterprise services for businesses - Cingular is the largest BlackBerry provider in North America; Push to talk service. | 
