nobody speaks when I answer, and when I try to call back the recording acts as if it is long distance

It's one of those c***suckers that try to get you in on a pyramid scheme.  I get them kind of calls all the time.  The one I just got from this number says it's from Matthew Jones...the names on these recordings change all the time.  I realize I shouldn't call them such vile names beings how I am sure they're trying to quit.  These are such a pain in the a** for those of us using a pre paid cell phone.  I would venture to say that I've spent over $5 in checking my messages just to find out it's a solicitation.