Packing light? Do these 4 things on your iPhone first

Phone tweaks are sometimes low on the priority list for travelers, but they shouldn’t be. We’re often dependent on our devices for navigating our own cities, never mind new places with unfamiliar signs. They’re also a source of entertainment on long rides, and, of course, a communications lifeline — whether that means keeping your group together on an excursion, or reassuring loved ones that your plane landed safely.