I knew they went back pretty far; I would have thought it was actually farther back.
"Car phones", which were the early cell phones, were a staple of 70s era TV and movies. Showing a character using their car phone was an easy way to show that they were truly rich, and usually it was in a super nice car like a Rolls — with a chauffeur, naturally!
I think the first time I ever saw a car phone in person was in the late 80s...
I remember them from the 80s (big chunky things), but didn't know they had been around 40 years. I remember when they first became common in the 90s...everyone called them "car phones," because the use was mostly limited to the car (and there'd be a little curly antennae on the rear window of anyone who owned one).