were developed AT&T
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During most of the 20th century, AT&T had a monopoly on phone service in the United States. The company began its history as the American District Telegraph Company, formed in St. Louis in 1878.
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AT&T Latin America.
Formerly AT&T International, Inc. (2017-2018)
Subsidiaries AT&T Mexico Vrio
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Answered by
2
During most of the 20th century, AT&T had a monopoly on phone service in the United States. The company began its history as the American District Telegraph Company, formed in St. Louis in 1878.
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