Or get a cheap "armored" waterproof Android phone. There is a whole thing of Android phones that look like Black and Decker designed ruggedized phones, some of them with extra large batteries. My son has one that is pretty much indestructible. Also ugly enough some other kids cornered him and wanted to "see it" a while back and decided it wasn't even worth stealing.

Not cheap, but CAT phones are pretty awesome: https://www.catphones.com/en-gb/

I have one of those - “builder phones” as some call them - for outdoor activities.

Cheap, fucking indestructible, and you could probably bludgeon someone to death with it in a pinch.

It also has a thermal imaging camera which is surprisingly handy for stuff like “finding where in the garden my cat is hiding at night” or “figuring out what’s overheating” or monitoring the state of my compost bin.

Depending on the remoteness and risks, I would go for a better case and a backup simpler and more reliable device.

The simpler and more reliable backup device is the Garmin InReach.