If you clamp an iPhone or other smartphone on your handle bars, and use Google Maps, Apple Maps, GAIA or other mapping apps, and would rather be on a twisty road than a hi way, very interested in how you deal with cellular coverage blackholes? Do you preload or download maps for the areas you're traveling? Does that work? Have you ever gotten into a jam with no cellular coverage? When riding in the boonies, what do you do? Are cellular coverage gaps a big problem, something you can live with, or a nuisance in any way? When riding with others, do some have coverage and others not? Would love to hear your thoughts.