laura bautista

The mobile phone history goes back to the beginnings of World War II, where it was seen that it was necessary distance communication from one place to another, which is why the company created a team called Motorola Talkie Handie H12-16, [citation needed] which is a computer that allows contact with the troops via radio waves whose frequency band at that time did not exceed 600 kHz.
The first civil mobile systems begin to develop from the late 40s in the United States. Were analog radio systems used in the first amplitude modulation (AM) and frequency modulation subsequently (FM). He popularized the use of FM systems thanks to its superior audio quality and resistance to interference. The service was in the HF and VHF bands.
the inventor of the cell is martin cooper