I looked at Punkt.

They keep saying "If you don’t pay for the product, you are the product". Okay, all fine and well.

But what will my phone still actually be able to do if / when I stop my subscription? Not a single clear answer besides "[…] gradual feature deactivation, and ultimately reverting to a device running AOSP".

Doesn’t really inspire confidence.

Swiss privacy phones? https://www.punkt.ch

What subscription?