Cellular Phones

It wasn't until 1947 that scientists began to study the idea of cellular phones. Cellular phones are telephones that use radio wave transmissions rather than wires to make the connection between telephones. Crude mobile phones existed but were not very correct or efficient. Scientists found that if you had small communication cells it would give a much better connection.
The name cellular comes from the radio transmitters called cells. Cells are really small radio towers that are closer together than large towers. These cell towers are less expensive and have a better connection. They send and receive signals to and from the phones. So, cellular phones are actually two-way radios!
In the United States, the FCC (Federal Communications Commision) limited the cellular phone frequencies in 1947, so only 23 conversations could occur at the same time in the same service area. So the scientists did not do very much research until later.