The bst thing to do is to purchase a used iPhone that is already unlocked. I've purchased a couple from Craigslist with good results.
Once an iphone is unlocked can it be used in the states, europe and here?
What unlocked used iphone model would you suggest buying for here?
What is a good price for it?
Would you buy it here or on craigslist or ebay in the states?
Thanks!