Back in the Dark Ages when Caller ID was being released, we were able to block any caller who chose not to show their phone number. The caller could then unblock their number for that one phone call, or decide not to place the call after all.
I am being harassed, bothered, (whatever) by people with accents who pretend to be Microsoft Technicians (Cyber Security, et al). I want that option back whereby no call will come through to me if it does not have a caller id. I AM registered on the 'do not call list' but it does no good because I don't have the number of the person calling me (and spoof they will) but at least my phone won't ring until such time as they allow a number to show up.