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
Emma Jesson brings you Sunday night's forecast
Cold and clear with widespread frost on Sunday night. Sunny Monday then showers
A number of Britons are feared stranded on Mount Everest after the Nepal earthquake triggered a deadly avalanche on Saturday.