cell phones

mobile telephone

Sep 19, 1921

The Detroit Police Department, began experimentation with one-way vehicular mobile service.

cell phones

Period: Sep 19, 1921 to Sep 19, 1982

mobile telephone

Sep 19, 1936

Alton Dickieson, H.I. Romnes and D. Mitchell begin design of AT&T's mobile phone system

mobile telephone

Sep 19, 1946

A driver in St. Louis, Mo., placed a phone call,it was the first AT&T mobile telephone call.

Mobile phones

Sep 19, 1971

Richard Frenkiel and Joel Engel of AT&T applied computers and electronics to make it work.

mobile telephone

Sep 19, 1973

Martin Cooper of Motorola made the first cellphone call to his rival Joe Engel of AT&T BellLabs

mobile telephone

Sep 19, 1982

FCC granted commercial licenses to an AT&T subsidiary, Advanced Mobile Phone Service