I had the exact same experience as "Jon". I didn't answer, then tried to call back: "Your call is very important to us. Please stay on the line and you'll be transferred to the next available agent.", then it rang 4 or 5 times and then said "goodbye" and hung up.
This number called twice from Kaysville, Ut. First time I did not answer. The next time I answered and she wanted to offer me a warranty on my car and wanted me to give her the mileage. I told her I didn't know. So she kept asking me if I could check. Then told me that she would call back so I could check the mileage. Then i asked her why then she hung up on me. It's probably a scam. Her accent was so heavy I really couldn't understand what she was saying. Next time let it ring.
This company has called me several times i have told them i am on the do not call registry they say oh ok we will as your name to our do not call list today i filed a complaint with the ftc regarding this company it is a scam and they need to be reported