I've reserved two 32GB iphone 4s for pick-up from my local apple store - one for me and one for my cousin in Spain. Both were eligible for the $299 upgrade through my family plan. Neither of us have had iphones before, and we're not sure what we need to do in order for him to use it Spain. I imagine my cousin's phone would need to be unlocked somehow, and he is willing to pay any fees associated with this process. Please advise. Thank you in advance.