Also just a note. It’s better to silence the ringer than immediately reject. Some spam systems will register the reject since it doesn’t ring the full 4 times and it’ll mark the number as active. (Even worse sometimes they’ll start calling back to back from different numbers).

Silencing it lets it ring out the full 4 times and they don’t know if the number still has a person on the other side. Also just using the default VM prompt rather than a custom one will help reduce the numbers.

Source: Annecdotal via tests over the years between a few friends and I.