Ameritech Cellular

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Ameritech Cellular was the first company in the world to provide cellular mobile phone service to the general public. Cell service became publicly available in Chicago on October 13, 1983. The company was a division of Ameritech which, as of January 1, 1984, was the holding company of Illinois Bell, Michigan Bell, Ohio Bell, and Indiana Bell, who provides landline service to the Great Lakes region. Originally named Ameritech Mobile Communications, it later became known as Ameritech Cellular.

Following the SBC merger, Ameritech's wireless network was integrated and added to SBC's Wireless network. Originally Ameritech used CDMA as its network technology choice, but then converted to TDMA to be compatible with SBC's other wireless networks that were mostly using TDMA. During the SBC Communications merger its First and Original network in Chicago was sold to GTE (which later became Verizon Wireless).

It was one of the 11 cellular companies under SBC and BellSouth that became Cingular Wireless in 2001.

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