Can I buy the iPhone 5 unlocked in an apple store without pre-ordering it?
It depends on the country and available supply. If unlocked iPhones are available at all in your country, call or visit your local Apple Store and inquire.
fx. in Boston?I'm from Europe but I'm going there in a few days.
There's no way anyone can know if a Boston Apple store will have an unlocked iP5 when you visit. I suggest calling them when you arrive.
AFAIK, they're only sold online by Apple right now.
Remember that warranty on iPhone is valid only in country
of original purchase.
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