I'm in complete agreement with flyinlowe. I like to be away from such things as phones, but I get it that guys need to be in contact with family in case of emergencies etc.
It's all relative to your personal situation. Myself, I got along great without a cell phone before there were such things as cell phones. Now my wife wants me to carry one in the field in case I get in trouble and need help. The phone stays in the truck.
If I DID carry a phone hunting and I WAS concerned about dropping it off a cliff I'd just tie a loop of 550 cord around it and tie the other end to a belt loop.