The first call was in 1973 from Martin Cooper of Motorola when he dialed his rival from Bell laboratories, Joel Engel.
The rest is history.
That first call was placed on a Motorola DynaTAC. The talking brick was nine inches tall and allowed for a whopping 35 minutes of talk time running through 30 circuit boards.
Cooper told The Guardian he doesn't remember much about that call but he thinks but he believes it was "I'm ringing you just to see if my call sounds good at your end."
Recharge time was a scant 10 hours.
It was still another ten years before the first commercial cellphone was approved by the FCC.
That model was the Motorola 8000x and it would set you back $3,995.
See pictures from the history of what has become our "can't live without" device now at The Guardian.