Yeah in altitude I rarely had no coverage. I’m usually offline when you’re between mountains deep in a valley. Also even I that usually don’t go much more than 1400m altitude I have a garmin GPS with the inreach thing with the sos button. It’s because I usually go alone. So just in case
What is weird is the phone in silent and him not trying to contact for help. Mobile coverage maps shows that this area is under coverage. From a personal experience, when It’s really cold I usually put on every piece of clothes I can once I stop moving. Even get in my sleeping bag if necessary.
You should always boycott the FIFA World cup
This doesn’t work well in France I think