Cingular Wireless (acquired by AT&T)

Cingular Wireless was a major mobile phone carrier in the United States that operated from 2000 to 2007. It was formed through the merger of several smaller providers and became one of the largest wireless companies. In 2007, Cingular was acquired by AT&T, a leading telecommunications company, and rebranded as AT&T Mobility. This acquisition expanded AT&T's network, customer base, and services, making it one of the primary providers of mobile phone and data services in the U.S. The transition improved network coverage, technology, and customer options across the country.