We have a Verizon Jet Pack, but rarely use. Verizon makes it to hard and expensive to use. We have two T-Mobile lines with 5GB of high speed data on each for $60.00 a month (T-Mobile ONE Unlimited 55 plan). After that they throttle you back, or you can pay another $15.00 for an additional 20GB of high speed data. Much cheaper then the Jet Pack.
So , yeah, I kinda agree. And as much as I enjoyed setting up my old iPhone for off line use, I'm one person not going without a cell phone (double negative). It really doesn't matter if it's a tablet, laptop or cell phone, I'm on line.
I do all my banking from check deposits to transfers to paying bills on the phone. I don't drive, so I check buses and other public transportation,,, and I check Google Street before I ever leave to make sure there's a path or sidewalk for my mobility scooter. I even check for cut-out ramps at intersection and in front of stores. I also look to see where cross walks are located. I never had to, but if my mobility scooter dies or breaks down, I'll get a Uber or Lyft, it's travel compliant and breaks down into five pieces. Since I don't drive I order on line as well, everything from food to batteries. I watch TV and listen to the radio on my phone. I could go on but I think you get the idea, but with all this, I try to go off line as much as I can. I still watch TV over the air when I can and have an AM/FM radio.