I have an iPhone 4s and it does it once in a great a while but generally it works without issue.
First of all, thanks for choosing Buick! Regarding the Iphone pairing issue, I would encourage you to visit the dealership if you feel there is an issue. All repairs should be covered under warranty. If you take it in, please PM if you have any issues. Your business with Buick is appreciated. Have a good week!I've noticed it only happens when the weather is cold. It worked all summer with no issues and now that its getting cold again its acting up again.