Hey, just wondering.
I know the iPhone connects to your Sim Card's internet service, and it can also connect to your wireless network. When connected to a wireless network, does it use that internet service for youtube?
more specifically, the iPhone youtube function will ONLY work over the ATT cellular data network. If you unlock the iPhone and use it on another network, you won't be able to view youtube except over wifi. Now, I can't say for certain, but I guess it's possible that unlocking somehow disrupts the youtube function totally? You should still have youtube over wifi - only speculatng as my phone is not unlocked.