But...GPS only narrows your call down to the nearest cell tower and the Highway Patrol can't see the wreckage from the road.
Betcha think they'll launch a chopper, given the terrain and what's at stake.
But watch this video and you'll hear the Arizona Department of Public Safety say they can't and won't do that.
And so the man on the phone and his young son died waiting for help to arrive....their bodies found when it became a "missing persons" case two days later and the helicopter finally went up.
Story from ABC15 (KNXV-TV, Phoenix...my day job).
