AT&T is the largest telecommunications company, second largest provider of mobile telephone services, and the largest provider of fixed telephone services in the United States. AT&T began as Southwestern Bell Telephone Company, one of seven Regional Bell Operating Companies (RBOC) created in 1982 in the divestiture of the American Telephone and Telegraph Company. The AT&T Alliance Channel works with Solution Providers to offer the full range of AT&T’s industry-leading portfolio. Solution Providers can use the power of the AT&T brand to generate business growth and help customers accelerate their digital evolution.