That’s just the reason I bought my iPhone 6 Plus. Big enough for maps, yet fits in the pocket. Get GaiaGPS app — best out there. I bought a Mophie juice pack for it as well as a big 30,000 mAh battery pack. It weighs close to a pound, but you won’t run out of power. The Mophie gets me through any day hike.
Just be sue
Re to download maps before you go and turn on tracking.
Saw a backpack with a solar panel built in the top to be used for recharging cell phones, tablets and such. Might be worth investigating. But, won’t help much when you’re waaay out in the outback. Suggest a good compass and topographic map; and Bic lighter :)
Add a small solar charger to that outfit.
Presumably in an Otterbox or life proof box. A broken screen is useless.
iPhone 6 Plus and Mophie; I’ll check them out.