Opting out of ATT seems like the most obvious no-brainer, but are there options for phone service that are actually halfway decent?
Or as an alternative, would it be feasible to get some kind of internet phone/texting service, use that over wifi, or maybe have a basic data plan to go with it at most?
that won’t work without telling us your region. the largest part of the world doesn’t even know what is AT&T, let alone ATT
Generally speaking, if someone asks/talks about some local topic without bothering to specify where they live, you can just assume they live in the US :)