Who invented the cell phone?

Inventor Martin Cooper holds one of the first mobile phones in this undated handout photo.

There once was a time when cell phones were rare and reserved mostly for professionals who could afford one. Today, it’s hard to imagine a world without them. Even if you don’t own one yourself, you probably see dozens of people talking on a cell phone every day. The rate at which we adopted the devices is astounding. But who invented them?

Alexander Graham Bell invented the telephone in 1876. And then in 1900, on December 23 an inventor named Reginald Fessenden made the first wireless telephone call. He was the first to transmit the human voice via radio waves, sending a signal from one radio tower to another.

In 1947, an engineer named William Rae Young proposed that radio towers arranged in a hexagonal pattern could support a telephone network. Young’s design allowed for low-power transmitters