How to deflect number withheld calls on a mobile?

[Platypus]

Make sure that there are not genuine calls that you may miss if you blacklist all with-held numbers.
For example my daughters school uses a with held number,

Likewise my local GP surgery

[Ignis Fatuus]

Likewise my local GP surgery

And most of the agents who have actually got me contracts recently.

In fact most of the calls that I really want to take are from "hidden" numbers.

[PAH]

For those scenarios they'll leave a message if it's important. Works for me.

Maybe my anti-social tendencies mean I don't really give a **** if someone can't easily get hold of me without a bit of extra effort their end. I'd rather have the more peaceful life than get pestered with unknown calls I wouldn't have answered if I'd known who was on the other end.