Forty years ago today, Marty Cooper made the first mobile phone call in history. The prototype was eventually released as a commercial product to the public as the Motorola DynaTAC 8000x. It weighed 2.5 pounds, cost $3,995, and only had enough battery life for 20 minutes of talk time on a single charge. Mashable has the story:
On April 3, 1973 — exactly 40 years from today — Motorola employee Marty Cooper made the first mobile phone call.
Marty used a Motorola DynaTAC to call Bell Labs (then a division of AT&T), reportedly saying "I'm ringing you just to see if my call sounds good at your end."
The device that Marty used to place the call was a prototype which would later become the Motorola DynaTAC 8000x.
Mashable also has a great graphic showing the history of cell phones.