KenP: If you could ask them about international calls (incl. minutes) I'd be very grateful, if they know that is.
As for the OnStar phone service.. I did look at that, but as ppl said, it actually uses standard cell services. I've also tried finding out if I would be able to change the sim card in the H2 to use another cell provider, but not even OnStar themselves have been able to answer that one - so any takers?
I know that here in Europe, where you get a integrated phone, you can swap out the sim for whichever provider you're with, but...