I had a call with Apple Tech Support on this problem this mornign. The following is the feedback I left for apple at http://www.apple.com/feedback/iphone.html I suggest everyone on this forum leave their comments as well, as Apple apparently doesn't give a S%#t about us.
"My iphone 4 worked fine in every car with every IOS version including 6. I got my new iphone 5 and have problems. I pair, I can make calls but when I receive calls in my 2012 Infiniti M37m the bluetooth disconnects. The only way to get the call is to answer on my iphone, then switch it to MyCar. This is extremely dangerous and unlawful in most states! It defeats the entire purpose of having handsfree!
I called Apple with the problem and they needed to have me at my car so they called back this morning as they said it is a setting issue either in my phone or car and they needed me in the car. They called this morning and the first tech had no idea of my problem. After 10 minutes she said she can't handle this and elevated it. Then a Supervisor Kevin came on who I was EXTREMELY disappointed in his assistance and attitude. He initially told me that this is not an Apple problem. They made the phone the car manufacturers need to fix their software to work with their phone. I told him of the forum https://discussions.apple.com/thread/4349029?answerId=20255150022#20255150022&ac_cid=tw123456#20255150 that has 10 pages of complaints from people with all types of cars, so this is not a car problem but an Apple problem. He told me even though this is on an Apple site, Apple does not read or monitor their own forums. Pretty said and poor customer service from a company that used to pride itself in customer service.
His attitude was it is not Apples's problem. We made the phone if it doesn't work in the car it is the car's problem, even though my iphone 4 with IOS6 worked fine. He then said that is because it is a hardware problem in the iPhone 5 and there is nothing he can do about it. If he sent me a new phone I would have the same problem. Three is nothing Apple can do at this point to fix the problem.
So in summary 1st Apple tells me it is a setting issue in my phone or car. Then it is a car manufacturer problem. Then it is an Apple hardware problem. It is a problem that Apple has no fix for and has no idea how or if ever it will be fixed. It also seems that Apple couldn't care less if it fixed or not.
My conclusion after this phone call is a few people in Apple know of the problem and don't give a **** that it is a major issue for the customer.
Steve Jobs must be rolling over in his grave.
What is Apple going to do to fix this problem hopefully as soon as possible?
A VERY unhappy customer with your product and your service representatives."