Dale, I am experiencing the same issues. I have just updated the software and now my pairings to my car and the work vehicle have stopped working. Only thing I can get to pair is my Garmin. I have been to Telstra and Apple support with no luck. Should not have upgraded the software.
Maybe I should have got the Samsung Galaxy like my workmate did as he has had no issues.
iPhone 4S, iOS 6.1.2