Blank screen in Phone mode

[Whit45]

My friends 2012 M3 Idrive stopped recognizing all phone functions. The screen is blank, and no voice recognition when he calls up phonebook. Nav and the other functions show up on the screen but no phone. He has owned the M for over a year, and everything worked fine until last week. Any ideas?

[Scrippy]

Originally Posted by Whit45

My friends 2012 M3 Idrive stopped recognizing all phone functions. The screen is blank, and no voice recognition when he calls up phonebook. Nav and the other functions show up on the screen but no phone. He has owned the M for over a year, and everything worked fine until last week. Any ideas?

Pull battery for 5-10 minutes. If it doesn't come back after you restore power it may be the combox in the trunk. Phone features are done through it and not the CIC.