I have an issue with my 2014 Jeep Grand Cherokee, it pairs and stays connected or at least appears to. When a call comes in the phone and car say I am connected, but only the phone rings. If I try to make a call from the car it attempts to make the call, but stays in limbo until a turn it off. While it says connected, it will not let me disconnect or delete phone.
I have had 5-10 phones with this car and all have worked without issue.
I would say that this is not limited to GM