I've had this problem now for a good while, but it took me quite a while to recognize the pattern. During the cold weather I would regularly preheat the Volt using my Android phone to activate it. Then on the way home the normal thing is to call home and let my wife know that I'm on the way. If I have the bluetooth feature activated on the phone it would always place the call without a problem. I noticed that when the Bluetooth was turned off the, the phone in the car sometimes seemed to "get stuck" making the call. It just seemed to go into never-never land and never complete the call. This did not happen too frequently, because mostly the bluetooth took care of it. Then I noticed - there seemed to be a 100% correlation - it always happened after a remote start. So, it seems like something about the remote start is locking up the phone in the car so that it is unsuccessful until you try it, then cancel it, then try it again. Anyone else? I did try calling OnStar and they blamed it on "spotty cell phone reception". I suspect that it is more a software problem than hardware, but then I'm a software guy and everything looks like a software problem to me.