Phone Issue
I been having the Cayenne for over a week now. I tried the phone when i first got it, and it was working fine. However, starting yesterday i got a seperate SIM card for the car and tried the phone more. This time, the phone was not working well. You could see the signal strength alright, but when you try to dial, you get the immediate busy signal... if you tried to call the number it is closed and as if the phone is not on. Tried many things but no luck... i even changed the SIM card and tried several others... still teh same. I dont have a handset in teh phone. ANY IDEA before i take it to maintainance? Any idea how you can reset the phone system>!!!! 
