I completely understand that. There's lots of places it won't work here in the Ozarks too. If you already carry your phone, it's a handy tool to have in it, and it doesn't weigh anything extra. That's the best that can be said for it when it doesn't work.

When it does work, it could help save a life.

So, like I said, you have to weigh carrying one based on how effective it can be for you. If I were hiking where you are I probably wouldn't carry one, I'd carry a better camera instead.