[dale_glass]

Paper has limited information. If you failed to acquire a map with the relevant useful information you have a problem. Not every map contains enough information for every possible need. If you planned on going by car then improvised and took a bus you might not even have bus stops marked on it.

> I can't imagine being so dependent on a phone which can be accidentally dropped, misplaced, or simply run out of battery charge that I would be lost without it.

Same way you deal with anything else: what if you have a car problem? So you plan ahead. Get the car checked before a trip, fill the tank, figure out what to do if it does break.

Phones are easier. I've got a stack of old ones that are still functional, easy to bring an extra one. I have an external battery. You can charge in many cafes and similar, just find a Starbucks or something. You can go to a shop and buy a battery or the cheapest phone they have if it comes to that.