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Ameritech was one of the seven Regional Bell Operating Companies created after the 1984 AT&T divestiture. It merged with SBC Communications in 1999 and became part of AT&T in 2006.
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Ameritech was one of the seven regional Bell operating companies created by the 1982 breakup of AT&T. It diversified into unregulated businesses such as cellular phones, publishing, and office automation systems.
Ameritech Cellular was the first company in the US to provide cellular phone service to the public in 1983. It was a division of Ameritech, a holding company of several Bell operating companies, and later became part of AT&T Mobility after mergers and acquisitions.
AT&T Teleholdings, Inc., formerly known as Ameritech Corporation (and before that American Information Technologies Corporation), is an American telecommunications company that arose out of the 1984 AT&T divestiture.
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Ameritech was a regional telephone company that merged with SBC in 1999 to form AT&T. Learn how Ameritech evolved from its origins as American Information Technologies Corp. and became part of a global communications leader.
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