Bill V.
Actually it is possible if a small, low powered, directional repeater antenna was installed in the vehicle and only activated when the vehicle was running or in motion. That could block or scramble all cellular devices in the vehicle. The newer vehicles could also contain shielding that blocks cellular signals unless the phone is connected via BlueTooth and then it could broadcast through an external antenna. The technology exist, but it is just a matter of cost and a car maker and a cellphone maker willing to push the issue.
...Rich
Actually it is possible if a small, low powered, directional repeater antenna was installed in the vehicle and only activated when the vehicle was running or in motion. That could block or scramble all cellular devices in the vehicle. The newer vehicles could also contain shielding that blocks cellular signals unless the phone is connected via BlueTooth and then it could broadcast through an external antenna. The technology exist, but it is just a matter of cost and a car maker and a cellphone maker willing to push the issue.
...Rich