I honestly didn't even know onstar was still around. In a world with smart phones, I am stunned they have subscribers. It is probably a lot like sirus XM. They have a deal with car manufactures and hope people keep the service after the trial.
Yeah, there are people... I could go on a rant here, but it would take us way off topic.
My CarPlay works really well on DP3 in my wife's Ford Edge (Sync3). Not so much on my Alpine ILX-107... still hoping for a better experience with DP4, hopefully next week.