Thunder Bolt
Silly old bat
Just turn your phone off, it could save you so much heartache later. I've heard all the excuses such as I need my phone for work. It's pathetic. Just pull over and turn your phone on to check things now and again - is this too difficult?
I haven't used it, but our car has a phone built into the steering wheel. The phone book links via bluetooth, so you press the green phone with one finger, say 'home' and it automatically rings home.
I'm sure Hyundai aren't the only car manufacturers that have this.
Bus drivers are in radio contact with their depots, & taxi drivers take radio calls.