No signal? No problem. Apple Maps has a download feature in iOS 17's beta, and Google Maps has had the same capability for years.

To download a map in Google Maps offline, open the Google Maps app on iOS or Android and tap your profile picture on the top right (you must be logged in to your Google account for this to work).

Watch this video to see how to download and use Google Maps with no internet. How to download offline maps Google Maps and Apple Maps let you download maps to use offline.