I know this is probably vague since the new iPhone hasn't been released yet, but I would like to buy the iPhone 4 at its release, from AT&T without the contract ($599/$699), because I move to Germany a few weeks later. As far as I know it is still locked to AT&T then. Could you use it with a German sim card. How do I activate or can I avoid an activation and how can I use it in Germany? Do I need to wait for an unlock? I don't want to buy it in Germany because it is far more expensive and I don't want to use it with the standard-iPhone carrier. Please tell me anything you know about this matter.