I just got a new 3gs, activated it perfectly fine about 10 mins ago with no delays. I was able to call the house line and talk there perfectly. But when I call the iPhone 3GS, it doesnt work. The 3GS doesnt ring. Then the home phone tells me that I have a mailbox that isnt set up yet. What can I do to make the iPhone work? I do have a signal (2 bars).