I did use it. Was fun listening to them talk to the voice mail message with Hillary asking " How did you get this number ? "  Then just string them along with bs. Some actually thought they were talking to a person. Newer Iphone stops the phone from even ringing from unknown numbers. They can still leave a voicemail if they want. Just have to call it back if you want. At the time I used it, it did cost something. Dont remember, but at the time, I was glad to pay for it