1921 The Police Department in Detroit, Mich. begins installing mobile radios, operating around 2 MHz, in their squad cars.
1934 The U.S. Congress creates the Federal Communications Commission.
1940’s the mobile radios are able to operate at 30 to 40 MHz and become common between police departments and the wealthy.
1945 The first mobile-radio-telephone service is established in St. Louis, Miss.
1947 AT&T comes out with the first radio-car-phones that can be used only on the highway between New York and Boston.
1949 The Radio Common Carriors are the first step toward the cellular phone industry.
1956 The first real car phones, not car radios, come into play across the United States.
1964 A new operating system is developed that operates on a single channel at 150 MHz.
1969 The self-dialing capability is now upgraded to 450 MHz and becomes standard in the United States.
1970 Cell phone lobbyists finally win with the FCC and get a window of 75 MHz in the 800 MHz region, which allocated