I don't have a cell, I don't want a (jail) cell. I make sure someone has a basic idea of where I'll be and when I expect to be finished, especially if I'm in the woods. Other than that, I'm on my own but for the kindness of strangers and I've found there are many many very kind people on this planet.

I did read somewhere that you can dial 911 for emergency help from a cell whether you have a plan or not. You could only use it in emergency situations, of course. That you'd have to do more research on yourself.