They are very likely to and can hardly claim to have been uninformed of the risk. It isn't called 'Life Valley'. edit - doesn't mean putting up some radio cove

They are very likely to and can hardly claim to have been uninformed of the risk. It isn't called 'Life Valley'. edit - doesn't mean putting up some radio cover is a bad idea, however I suspect it is not some panacea against badly planned road adventures. If you are capable of venturing forth into Death Valley without much preparation, you are more than capable of managing to forget a phone.