If it was a phone you previously used, I'd want to go through the factory reset process before having it unlocked so that your personal info is totally removed before giving it to someone else. I would then think that they would have to use a computer to set up their own Apple ID so they can get apps to use...not sure if Apple ID is needed also before setting up their own email on the device. Many locals don't have their own computers so would need to borrow one to get it set up there, I would think, maybe they can get it handled at the Lime or Digicel store. Not sure, does Digicel carry iPhones yet? Lime does. If they sell iPhones, they may be able to get it set up if your friend doesn't have a computer. I wouldn't give my iPhone to anyone without clearing out everything first. If it's factory reset and unlocked, I wouldn't think it would lock up to the original provider if your friend plugged it into a computer or did updates.