This doesn’t work for everyone but this is what I have.

I use the open source app Silence. https://www.f-droid.org/en/packages/me.lucky.silence/

If someone is not in your contacts to just sends it stright to voice mail. I would love a self hosted option so I could set it up for my family as this dosnt work for most people.

Could someone explain like I am dumb, because I am. I don’t get it but I want to.