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Paper map and compass are enough for pretty much everywhere on the planet, excluding areas where positioning gets hard, like high density jungles.
Learn to actually read a map rather than trying to figure out where you are once you're lost on your phone. Get used to the area, visualize it in 3D in your head, imagine the sceneries all around you, and you may just be able to locate yourself without even checking your map.
Alternatively, you can learn the forgotten art of geomorphology, a science that was once used when there were no aerial imagery to draw a map solely by looking at the scenery and figuring out how it evolved up to this point, and you may just leave your map at home. Yes, it works.
Or you can get yourself a GPS locator, around $50, Bushnell makes great ones, dunno about other brands. Couple it with a paper map, and eventually a compass as last resort, and it'll have a much superior battery life than anything else and be just as good.