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Southwestern Bell Mobile Systems, Inc. was a wireless telephone company. It was created in 1984 as a split-off of Advanced Mobile Phone Service, the original wireless subsidiary of the Bell System. It was a division of Southwestern Bell Corporation.
Advanced Mobile Phone Service, Inc. was a subsidiary of AT&T prior to the Bell System Divestiture. Abbreviated AMPS, the company was created in 1978 to build and operate the new Advanced Mobile Phone System, also abbreviated AMPS. AMPS was developed by Bell Labs to replace older, severely limited radiophone services, such as IMTS. AMPS was one of the first modern cellular phone systems, which remained in operation until 2008.
The Bell System was the system of companies, led by the Bell Telephone Company and later by AT&T, which provided telephone services to much of the United States and Canada from 1877 to 1984, at various times as a monopoly. On December 31, 1983, the system was divided into independent companies by a U.S. Justice Department mandate.
Southwestern Bell Mobile Systems did business under the Cellular One brand name until 2000.
Cellular One is the trademarked brand name that licenses services used by several cellular service providers in the United States. The brand was sold to Trilogy Partners by AT&T in 2008 shortly after AT&T had completed its acquisition of Dobson Communications. Cellular One was originally the trade name of one of the first mobile telephone service providers.
It continued to operate as Southwestern Bell Mobile Systems until 2000, when SBC Communications and BellSouth combined their wireless operations into a single company, Cingular Wireless. Southwestern Bell Mobile Systems' assets were then transferred to a Cingular as a limited liability company named Cingular Southwestern Bell Mobile Systems, LLC. The company existed until 2006 when it was dissolved. [1]
BellSouth, LLC is an American telecommunications holding company based in Atlanta, Georgia. BellSouth was one of the seven original Regional Bell Operating Companies after the U.S. Department of Justice forced the American Telephone & Telegraph Company to divest itself of its regional telephone companies on January 1, 1984.
A limited liability company (LLC) is the US-specific form of a private limited company. It is a business structure that can combine the pass-through taxation of a partnership or sole proprietorship with the limited liability of a corporation. An LLC is not a corporation in and of itself; it is a legal form of a company that provides limited liability to its owners in many jurisdictions. LLCs are well known for the flexibility that they provide to business owners; depending on the situation, an LLC may elect to use corporate tax rules instead of being treated as a partnership, and, under certain circumstances, LLCs may be organized as not-for-profit. In certain U.S. states, businesses that provide professional services requiring a state professional license, such as legal or medical services, may not be allowed to form an LLC but may be required to form a similar entity called a professional limited liability company (PLLC).
Southwestern Bell Mobile Systems' physical assets survive in what is now AT&T Mobility.
AT&T Mobility LLC, also known as AT&T Wireless, marketed as simply AT&T, is a wholly owned subsidiary of AT&T Inc. that provides wireless services to 138.8 million subscribers in the United States including Puerto Rico and the U.S. Virgin Islands. AT&T Mobility is the second largest wireless telecommunications provider in the United States and Puerto Rico behind Verizon Wireless and the largest wireless telecommunications provider in North America when including AT&T Mexico.
