I have a Lumia 920 and have loved Windows Phone since my HD7. Back in April I switched from an Audi A4 to an A6 and in my A4 I had successfully had the sms read and reply functionality working and found it a really useful feature. Since getting my A6 I haven't been able to get it to work, I receive a message and then get the notification from my phone through the car Bluetooth asking whether I want to read or ignore, but the car never picks up my response so I have to let it repeat three times and then it switches off.
I believe it's the in car system which isn't activating the microphone for my response due to a missing Bluetooth profile (sorry I'm not that clued up on Bluetooth specifics)? Can anyone help me identify what's missing so I can talk to Audi to see if they can help resolve this?