You have no doubt seen it, and each time you do, you're being put in more danger.
Figures collated by a car insurance company found that thousands of people still make calls from behind the wheel - something which can have deadly consequences.
You can see the full report from Dan Ashby below.
More top news
A young couple from Wallsend - Abbie Douglas and Sam Younganan - describe hearing gun shots in the Tunisian resort of Sousse
Temperatures on the rise from Tuesday. Some very warm and muggy nights to come
A British holidaymaker captured the scene on a Tunisian beach after a gunman opened fire at a beach resort in Sousse on Friday.