Those phone calls are quite an annoyance. We get them on our land line. I pick them up, don't say a word, then hang up. But if someone speaks up, I mean a live person then I am rude to them. All I say is "WHAT DO YOU WANT?" Sometimes they speak up so then I'm rude and call them out as scammers from a boiler room in India. Sometimes they just hang up because they don't know what to say because they are probably expecting to hear a "Hello". Ignoring the calls just sends them to the answering machine, at least I cut the ringing short. They're never going to stop so rudeness is all they get. Most of the the time they're just automated, instant hang ups. Live people, instant rudeness.