[rampant_ai]

Some other things to keep in mind regarding any phones in your group if you end up stranded:

If you're in an emergency and your phone says you have no signal, call 911 anyway. It'll attempt to reach any network in range that the phone is compatible with, not just the network you're subscribed to. Some phones nowadays will show "Emergency calls only" when this is the case, but it doesn't appear to be 100% consistent, so again, call anyway.

Also turn on battery saver and when you're not actively trying to call, keep the phone in airplane mode. If you don't it'll repeatedly try to reach a tower which will drain your battery quickly. Don't power it off unless you don't plan to use it for the rest of the day, because booting up uses a lot of energy.