Are cellphone GPS capabilities good enough for the phone itself, or the cellphone company, to know how fast it's moving -- say, in a car, on a highway?
Could they be?
Seems as if lots of cars have GPS units these days. Could they trigger a cellphone disabler above some speed? Or, just have the speedometer do it?
["Disable" could mean the cellphone will still receive and signal that a "page" has been received, indicating that someone has left a voice-mail or text-mail on the cellphone system; but the ability to read, listen to, or respond to that communication will remain disabled until the phone has been at a halt for 5 minutes.]