[RKDinOKC]

On my iPhone I use a free app called Hiya. It compares calls that come in to some database and marks them as solicitors or spoofed numbers. I have it automatically send them to voice mail.

The only problem I've had is that i have to turn it off to receive support call backs from Microsoft on Office365 admin stuff. But they usually call back within 15 minutes so it's not too bad.

I can tell it's working because I have it set up so I can answer calls from my Desktop computer. It will ring once bringing Skype to the front, then immediately goes way as the phone sends it to voice mail.

Have been using it for a month. After another month, if it is not trapping any good calls with have it start blocking them instead of sending them to voice mail. Or I may make a recording of the number not in service thing and put that on my voice mail greeting.