So FYI, bro, I work in what is basically a high tech silicon valley start-up, and I could probably hit Apple (and often would like to) with a rock. I'm *making* the technology. And I'm still saying - first bring a map and learn how to use it - horizontally as well as vertically. I'd personally be embarrassed bringing a lot of gadgetry into the wilderness anyway. Don't be like one of those 10 or so a year that drive onto some dead end quicksand road in death Valley (this is all new btw, with the introduction of this fabulous technology) and get stuck in the middle of nowhere because Siri told'em to. Whoopse! Siri missed the giant sign saying road closed in 1956.
If I catch you on the PCT and you take a call on your cell phone while I'm giving you directions because you have no map I'm gonna be pissed. LOL
All that aside, this: