Cingular Wireless LLC is the largest United States mobile phone company, with headquarters in Atlanta, Georgia, United States. Cingular operates a network of multiple technologies. The most widely used of these technologies is called Global System for Mobile Communications, or GSM. On top of their GSM network they run a data network called GPRS (General Packet Radio Service) and an upgrade for faster speeds called EDGE (Enhanced Data rates for GSM Evolution). Cingular supports their legacy TDMA and analog networks. Former networks include various paging services and the Cingular Interactive division that became Velocita Wireless.