Hello, A friend who was studying in the U.S. recently went back to China. He left a few things with me because he didn't want them. One of these items is a 16GB iPhone 4. I assume it is out of contract and it is locked to that carrier (China Mobil). I was wondering if it would be possible to sell it in the U.S. to someone who is traveling to China. Is this illegal? I hate to throw away a perfectly good smartphone. I know it is illegal to unlock it, so I have no intention of doing that. Thanks!