Hi! I friend of mine from India wants to take a Gold iPhone 5S when she's flying back to India this holiday season for her mom. She found a seller on Craigslist who has an iPhone 5S which is activated on US Cellular. My question is would this phone work overseas if the local carrier in that country supports the bands ? I know it is locked from being used on US carriers but is it internationally unlocked ? Any info on this would help my friend. Thanks!