AT&T has set forth a separate policy for the iPhone; see return policy excerpt below
Apple Branded Equipment
Apple branded equipment is covered by a 14-day return policy and must be returned to the original point of purchase. If the Apple branded equipment is returned unopened and in the original shrink wrapping, it will be refunded back to the original payment method. Opened Apple branded equipment that is returned within 14 days will be subject to a 10% open box restocking fee. All products must be packed in their original, unmarked packaging including any accessories and manuals that shipped with the product.
Service Cancellation
You may cancel service within 30 days from the activation date to avoid the early termination fee of $175.
You will be responsible for all applicable usage fees, prorated access charges, taxes, surcharges or other charges through the termination date.
If you cancel service within the return period but do not return the equipment within the return period or if equipment is not returned in like-new condition, you may be charged the full retail price of the equipment.
If you paid a security deposit, it will take 1 to 2 billing cycles to process the return of the security deposit. The charges for service used on the account before the service termination date will be applied against the security deposit. Related posts:Wal-Mart to start selling iPhoneSybase Readies iPhone SoftwareApple, New York City In Legal Dispute Over LogoApple iPhone Prices Slashed In GermanyApple unveils higher capacity iPod, iPhone modelsIntel To Sell Apple MacBook Air Chip To PC Makers