Thank for all the info guys. When I hike, I too always hope there is no reception but when I know I am going somewhere where there will be reception I take the phone with me. Being an 18 year old girl traveling alone I like to have it, out of fear of the other 2 legged beasts out there. Mostly I hike in the whites and in places in maine so I wasn't sure what expect out in the Sierra. I think though, that I will ditch the phone for this trip. thanks again for the advice!! Safe Treks!