One of the most interesting aspects of the cell phone is that it is only a radio – extremely sophisticated, but a radio after all.
The telephone was invented by Alexander Graham Bell in 1876, and wireless communication has its roots in the invention of radio by Nikolai Tesla in the 1880s (formally presented in 1894 by a young Italian named Guglielmo Marconi). It was expected that one day the two technologies were combined into a single device.
In the era predecessor to mobile phones, people who really needed mobile communication had to rely on the use of radio-telephones in their cars. In the radio-telephone system, there was only one central antenna for each city, and probably 25 channels available in the tower.
This central antenna meant that the phone in the vehicle would require an antenna powerful, powerful enough to convey to 50 or 60 kilometers away. Also Estot meant that not many people podr