Ask HN: Want to move to use a "dumb" phone. How to make the switch?

I’m curious if anyone here has successfully moved to using a dumb phone. By dumb phone - I mean literally texting / calling only. No internet, etc.

Immediate isssues I see is not being able to use Authenticator apps. Not being able to use maps. Etc.

Has anyone made the switch and how to best go about it?