BBC News captured Marty talking about his first cell phone call to Joe Engel at AT&T on April 3, 1973:

Marty’s recollection:  “I said ‘Joel, this is Marty. I’m calling you from a cellphone, a real, handheld, portable cellphone.’ There was a silence at the other end. I suspect he was grinding his teeth.”

Read the March 21, 2011 article here.