Same issue here with a new Astra from Opel in Belgium ...
I just went to the dealer to have the UHP updated to last version but no luck so far.
I also noticed that the UHP is not the problem. It's clearly the Iphone. How ? Well ... If you keep bluetooth settings open and keep watching the phone while "connecting" , you'll see the bluetooth icon dissapearing and the Iphone bluetooth briefly de-activates and re-activates itself.
No problems with Nokia based phones ...
Also, as long as I don't "do anything" with the Iphone, it stays connected. I can even "receive calls". The problem is when trying to make a call or when trying to access the address book. Then it crashes the Iphone BT instantly.
Call history is available without issues.
It's also clear that if you go on
http://www.opel.com/mobileportal.pdf , you'll see the supported phone list and well ... Iphone is not on there 🙂
Hoping for this issue to be fixed is utopia I think 🙂 Let's just "hope" that OS 3.0 will help ...
Oh and I tried restore / reset / whatever. Pairing with UHP. Pairing with Iphone... No help