Airplane mode will always remind me of traveling with my trusty iPhone 4S or SE, whose batteries always struggled to get through a full day of maps, camera, mes

Airplane mode will always remind me of traveling with my trusty iPhone 4S or SE, whose batteries always struggled to get through a full day of maps, camera, messaging, and ad-hoc Google and Wikipedia. My workaround was to keep airplane mode on by default, using Google Maps offline data downloaded ahead of time off airport wifi, only occasionally "going loud" for a few seconds at a time to ration the 100 MB/day of roaming data that was cheap and convenient enough that I never bothered buying a local SIM card. The battery life difference was really dramatic.