How does one disable the phone/bluetooth on the Audi concert stereo? Whenever I get into the car, turn on the ignition, there's a delay before a beeping noise followed by PHONE coming up on the display. I've went through the menu etc and can't find an option. There's a nokia bluetooth kit which was installed by the previous owner which I'm assuming is causing it, I just didn't fancy pulling the stereo unit out just to remove it - easier option? 
Thanks in advance.

Thanks in advance.