Point 4 is more important than some may think, you can dial 911 without an active SIM. For this reason alone I have old phones in all my gloveboxes.
Plus a couple years ago my folks were floating the river and their dry bag somehow stopped being I dry bag, I don’t remember the story cause I wasn’t there. But, when they got home, I was able to set them up with passable phones while the ones they ordered online came in the mail.