I recently gave up my drivers license due to my age. (More about this in a freepmail)
But when I was still driving I never answered my phone when it was ringing, I also did not turn the radio on while driving. I do this not because it is the law, but for my own safety.
A friend of mine bought a new pickup truck and was driving it home from the dealer. He was also setting the radio push-buttons to the stations he preferred when he ran into a PARKED car, totaling the pickup.