We have a couple of HTC one m8 phones that we've had since June, Great phones. However playing around with them and our blue tooth stereo in the car ( a tevion purchased from Aldi's several years ago) has highlighted an issue
My phone will sync with it perfectly, make calls answer and disconnect using the telephone button on the stereo exactly as it is supposed to do.
My wife's on the other hand will sync with the stereo however the stereo's phone button won't answer the calls for it. She has to use the answer call button on the phone.
Definitely an issue on the phone as I put mine back in, replicated the situation and it worked of the stereo telephone button.
We've gone through the settings on both phone's side by side and as far as we can see they're set identically.
Suggestions anyone please ?