Cell phones are basically ubiquitous these days and, among other things, they are changing the ways in which search and rescue operations are being conducted. Although not an avid user, I find I carry and use mine more and more, pleasantly surprised at some of the very marginal places where I can get service.

For the informed prepper, what are the models, networks, and apps of the proliferating smart phones that should be considered for a potential survival situation? Battery life would be a definite consideration, I would think.

I would be most interested in the optimum set of features, the "sweet spot" that is the best combination of characteristics considering the costs involved, and I suppose it would be worthwhile to consider the top of the line, price is no object, absolutely perfect phone to pack into the woods and carry away from the home...