Forty years ago, on 3 April 1973, the era of mobile (phone) starts in the streets of New York City. The historic first phone call made by the director of the operating system for corporate communications division.
In 1973, there were no cordless phone or cell phone.
In a release in 1973, “mobile radio telephone” named Dyna-Tac-called can be operated with the radio frequency and talking on a telephone connection (conventional) anywhere in the world.
That means that in a city that has a system Dyna-Tac, people can call while driving a taxi, walk down the street, sitting in a restaurant or anywhere else that can reach a radio signal. Read more