I've never carried one before, but will on my next trip next year. Not planning to use it as a phone and most of the time it will be off. When it is used, it will be in airplane mode.

I have downloaded zoomable satellite photos of the lakes I plan to fish. They are useful for locating reefs, sand, and other fish holding structures. I also have downloaded compass and Swiss Army knife apps which may be useful. 8-) I also will carry a small charger to extend battery.

Your phone can also be a GPS. Not sure how it will work in Q for a sky map. I may have to check that one out. 8-)