I’m pretty old and I’ve been on silent unknowns for a few years.

I add lots of contacts. The iPhone also tracks if you’ve ever sent or received a real call. So it’s pretty easy to maintain.

The other day I had some contractors working in the house so I turned it off for a day.

With this on, I get zero spam. And I’m way better off than with it turned off and getting 10-15 daily spam calls.