Since the CLID said "WIRELESS CALLER" and the number is local, I picked up and said "hello". I immediately received a recording that started out by saying "Congratulations, you have just won a free cruise". I immediately hung up the phone. 95% of the time I don't answer or pick up the call and hang up immediately. Since I live in the ATL area, and since it looked like a cell phone - all I can say is they got me on that one!
Called Monday morning, 3-17/14 @ 10:35 AM, answering machine picked up, caller waited a few moments, then hung up, no message. Clearly a scam of some kind since a legitimate business or service would leave a message. Thank you to all the previous posters - your info is much appreciated.