We're not "have to have internet" but I do like to have access. My wife and I both have "hot spot" T- Mobile phones, I have an additional Visible phone on Verizon used if T mobile isnt. And finally, since I got in on the ToGo craze a few years ago, I keep the yearly plan on AT&T for Data.
Sounds like a lot but we are on the Geezer plan for T mobile, the 25.00 a month for Visible and I think the AT&T plan is 300.00+/- yearly for X amount of data...( 100 gigs yearly). Works for us and I've yet to be without at least some internet.
I did add a We Boost cell Booster also....helps a lot.