I have an issue with the x910 this unit has been installed for over a year now. Have only had 2 phone connected to this unit and has worked flawlessly until this week. No sound from caller and can not dial from head unit. Everything else (xm,radio,Cd,Sd card,aux..)works. I have reinstalled the blue-tooth 3.3 firmware and no change. Has anyone else had this problem? Please help my wife is not happy.