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The concept of a handheld phone was Martin Cooper's brainchild, and with the help of his Motorola team, the first handset was born in 1973.

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Douglas H. Ring and W. Rae Young at Bell Labs came up with the idea of cellular phones in 1947 and A. T. & T. actually began working on them in 1969, but they never considered building a cellphone for the user that would be any smaller than a box that would need to be installed in the trunk of your car (like the car radio phones that had been in use in various forms since the 1930s).

The car radio phone systems that preceded cellular phones (and remaining in use in some places as late as the early 1980s) were limited in the number of calls that could be handled in one city (early systems limited to about 3 simultaneously active calls with the most advanced systems of the 1970s limited to a few dozen simultaneously active calls) and were only supported by phone exchanges in large cities.

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