They will call my home phone, then immediately call my cell phone, then call back on my home phone, but never leave a message. The Caller ID just says "Florida". I refuse to pick it up, since they never leave a message.
I set my computer's Caller ID screener program to pick up the home phone when that number calls, and it plays an irritating message to them from the telephone company, "you must depisit coin..." :-)
I've gotten two calls from these people in the last two days. I reported them to the "Do Not Call" registry - let's hope they finally stop calling! I believe the number's coming from Orlando, Florida, based on a Google search.