Who is credited with the invention of the cell phone?

Do you recall a time when cell phones were uncommon? Nowadays, it's nearly impossible to picture life without them. Even if you don't have one, you likely see countless individuals chatting on a cell phone every single day. The speed at which we adopted these devices is truly remarkable. But who is the person behind their invention?

To uncover the answer, we must travel back in time over a century. Alexander Graham Bell, in 1876, was the genius behind the invention of the telephone. Then, on December 23, 1900, an inventor named Reginald Fessenden achieved something extraordinary on the outskirts of Washington, D.C.: he made the first-ever wireless phone call. He became the first to transmit human speech through radio waves, relaying a signal from one radio tower to another.

Fessenden’s groundbreaking work laid the foundation not only for radio broadcasts but also for the development of cell phones and mobile networks. In 1947, engineer William Rae Young suggested that arranging radio towers in a hexagonal pattern could create the framework for a telephone network. Young collaborated with another engineer, D.H. Ring, who managed a team at Bell Laboratories, which was part of AT&T during that period.

Young's groundbreaking design made it possible for low-power transmitters to carry calls across the network, while also considering handoffs — the process where a caller moves from one tower's range to another. Despite the brilliance of the concept, the necessary technology to implement it was unavailable at the time. It would take over a decade before the next significant advancement in the field.

As the world awaited advancements in cellular technology, companies like AT&T offered a limited number of customers the use of radio telephones. These devices were rudimentary by today's standards, resembling walkie-talkie transceivers. Only a few calls could be placed at once, sometimes as few as three, and callers often had to wait for someone else’s conversation to end. This made private conversations nearly impossible. Additionally, these phones were costly and some weighed as much as 80 pounds (36.3 kilograms), making them impractical for everyday use.

In the 1960s, Bell Labs engineers Richard H. Frenkiel and Joel S. Engel developed the necessary technology to support Young's cellular network design. However, as AT&T sought approval from the Federal Communications Commission (FCC) to establish a cellular network, a competitor made an audacious move in 1973.

This rival was Martin Cooper, then an executive at Motorola, one of AT&T's competitors. Cooper led a team that created the first functional cell phone, the Motorola DynaTAC. Though still far from a compact device, measuring 9 inches (22.9 centimeters) and weighing 2.5 pounds (1.1 kilograms), Cooper chose to make one of the first-ever cellular calls to his professional rival, Joel Engel at Bell Labs. In essence, the first cell phone call became what some might call a prank call!

It would take several more years to expand cellular networks and reduce production costs, making cell phones a commercially viable product. Yet, after over a century of research and investment, the fruits of this labor were eventually realized.