In 1973, when Motorola installed a base station to handle the first public demonstration of a phone call via the mobile network, the company is trying to persuade the Federal Communications Commission to allocate frequency space to private companies for use in new mobile technology . After some initial testing in Washington for the FCC, Cooper and Motorola took the phone technology to New York to prove to journalists and the public. On April 3, 1973, standing on Sixth Avenue in New York near New York Hotel Hilton, Cooper made a phone call from an original hand Dyna-Tac phone before attending a press conference on the hotel. The phone is Cooper with the base station on top of Burlington House (now the Alliance Capital Building) across from the hotel and the AT & T's telephone system, land-line. As journalists and passers-by saw that the number dialed and held the phone to his ear. The first call, placed by Dr. Joel S. Engel, head of research at Bell Labs, began a fundamental technology and communications market shift towards making phone calls to a person, not a place. This is the first phone weighed about £ 2.5 (1,1 kg). It was the product of Cooper's vision for personal wireless mobile telephone communications, distinct from mobile phones car. Cooper said that Captain Kirk monitor the Communicator of the television show Star Trek inspired him to develop the handheld mobile phone.
After the demonstration of prototype mobile phone to reporters, Cooper has allowed some of the journalists to make phone calls to anyone they choose to demonstrate that the mobile phone could serve as a flexible portion of the telephone network.
Cooper, considered the inventor of the first handheld mobile phone and the first person to make a phone call to the public in a mobile phone. Cooper and engineers who worked for him, and Mitchell is the name for the patent "telephone system Radio" filed on October 17, 1973.

