I am assuming apple will be selling in many countries that don't require a lock to the local carrier. Singapore and Hong Kong are two places (among many) that now sell unlocked phones.

So for the iPhone 4, what happens after you purchase a newly unlocked phone from one of these two countries - and you want to swap for another network when traveling? Are you stuck and can't swap, thereby defeating the whole purpose of selling (or buying) unlocked iPhone?

Or are all the networks coming out with an 'apple micro sim car'?