Howto refuse calls from "Unknown" etc on my moby ?

[Boo]

Hi,

I get a constant influx of pointless and annoying calls from "Unknown", "Withheld" and similar numbers. Anyone know a way to avoid them ? I could consider moving to a company who can do it for me but an Android app that silently prevents these calls from reaching my attention would be great too.

Any suggestions ?

Thanks,

Boo

[DirtyDog]

Blacklist app?

https://play.google.com/store/apps/d....app.blacklist