A friends kid just got in an auto accident because he was looking at
his cell phone. So, lets think of ways to make cell phones not work
in cars.
Indium tin oxide is a transparent electrical conductor that can be
applied to glass by evaporation. If we put it on the auto glass would
it block cell phone signals? Yes, it would only be done on new cars.
Yes, you could always roll the window down and use the phone.
Oh, he was not hurt thank god.

Frogwatch