I have an old (lol) 2021 motorola defy, which I unlocked the firmware and at some time ran magisk on it. Now, I just want it to be a modem and run one app, which I want so I can have a house based alarm telling me when sunrise is coming up and when the sun goes into "night" mode.

Did you know that the google "phone" app has by befault permissions to change system settings? And I witnessed it repeatedly doing so, re-enabling things and ignoring DND and all sorts. Yeah, I eventually shut that thing up but you know what?

If you are looking for some motivation to move towards cutting the wireless mobile connection, just check the permissions on your phone's google phone app.

You're welcome.

I'm gonna do it pretty damn soon. Might need to fully root that damn thing and rip everything out of it that isn't a modem and router. But it will be worth it. It has literally already cost me a good 2 days of my life this last week with it's disobedience.