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?
No idea if they store the phone number, probably not.
they do, you log in based on your number so they have to store it one way or another