AT&T

AT&T Mobility was known as Cingular until 2007. Cingular was formed by the merger of BellSouth Wireless and SBC Wireless in 2001. Cingular then acquired AT&T Wireless in 2004. Cingular's parent companies SBC and BellSouth then merged with each other, and with AT&T (not AT&T Wireless). The company's current wireless network uses GSM/GPRS technology. The company uses both the cellular (850 MHz) and PCS (1900 MHz) bands. They also offer EDGE high-speed data over most of their network, and WCDMA (UMTS) + HSDPA 3G technology over a large and growing area that includes most major cities.