I usually rely on cell service and have an external cellular amplifier and antenna I can mount if I need more range. Although you may not be able to make a voice call, a text or email can usually trickle over a slow or unreliable connection.
Areas that are outside of cell range, I keep track of public facilities. Where is the closest connection to the rest of the world? SPOT service for emergencies is inexpensive insurance if you are far off the grid, but I'm seldom so remote that it is something I need. I have considered a mobile (25w or greater) 2m Ham radio for emergencies and as a hobby but don't have the spare time to get in to another hobby while still working full time.
