They do require a Credit/Debit card or a Gift Card to purchase the iPhone.
Next time do a seach or check out the iPhone FAQ in the guides.
TEG
Actually, I didn't think you could use a gift card either...
just checked the iPhone FAQ in the guides as you suggested, and it only lists credit/debit cards.
rob.
Policy has changed recently and the use of gift cards is allowed. But for some reason, they don't accept cash.