I've been rocking my Lightphone 3 for a month as my full-time daily driver, with no companion device (Well, I have a Boox palma, but I only read on it, don't have any need for its other features/apps)

If I would have went straight from my previous normal of being super connected and addicted to my phone to where I'm at now, I wouldn't have been able to swing it. It's taken me almost 3 years of slow progress to be able to just fully ditch the smart stuff. Just start slow, keep on it, and you'll get there eventually is you really want to.

And all you have to do to move where your number points is to swap the SIM card. It takes only a coupe seconds. I still have my old smartphone that I pop the SIM into when I go to concerts so I don't break/lose my various dumb devices I've had over the years. The Lightphone 3 doesn't support eSim yet, though it's on the roadmap somewhere. It might be an idea to get a cheap smartphone that can use a regular SIM. Especially if it's a really low-tier device, you'll be able to use it, but the poor performance might push you to ditch the apps faster.