I just acquired the New Iphone 6 with ios 8 and The Hands free is not working for the calls. It is possible to place THE Call but the microfone is mute. Any advice or Solution?

 

I am also having major problems with iPhone 6. Connects, doesn't connect...plays music and phone rings but can't talk on it. I am OUT OF MY MIND!! I've done just about everything. This is not limited to Volvo. Here's a thread on Apple
https://discussions.apple.com/thread/6552977?start=60&tstart=0