Since purchasing I have noticed at odd times when I make a voice call (via in car bluetooth) - seems to only apply to the first outgoing one and maybe one in three times - the sound is messed up so that the voice I hear is almost slowed down and/or like someone is using the phone in water at their end. From what people have said - they hear a similar kind of thing at their side of the conversation. Has anyone else had this problem? I am using an iPhone 6+ haven't had chance to try another phone.

 

It would appear I'm the only one to have this problem!
Anyway I tried a Samsung Note 4 today and despite several calls didn't get the problem. I tried the iPhone again and had one call with the fault and one without.

I've found a single similar report via google:
https://discussions.apple.com/thread...art=0&tstart=0

My car goes in for the diff oil service tomorrow. I'll see if there is an update which might fix this.