This number just keeps calling and calling.  I program all "people I want to talk to" into my phone so I knew it wasn't family and friends.  Never did answer it, and they (of course) don't leave messages.  When I do a Reverse Lookup on the number, it comes up as a B2B Collection Agency???????  I don't have any unpaid bills that would warrant a call from a collection agency, so I don't know what their scam is