Who called from 4804001841

I've been getting them for the past week, never a message, and when I answer the line goes dead.

I keep getting phone calls - and they don't answer - I want to know why I enrolled do not call list but still get these aggravating phone calls - what can we do to stop them, they just called twice in a row, and hung up.  480-400-1841

I just hit my Black Berry to decline

rec'd a call from unassigned 480-400-1841.  Wanted to know if I lived in Arizona.  Like I would tell a stranger where I lived?

Person did ask for my wife.  Line was scratchy and person hard to understand. Twice I asked him if I could help him.  Then he says "Can you hear me now?" I said, " I have asked you twice if I could help...."  The phone hung up.  I tried to callback and got a recording that no one was available to take my call.