if you can go buy it at apple. i told them my iphone 5 was scuffed out of the box and i wanted to return it or exchange it. they brought out a brand new sealed iphone 5, and they didnt even inspect my original iphone 5 for the scuff. all they checked was the model number on the box and device to make sure it matched.
so they told me its 14 days if you want to exchange it for a different one, but i got 30 days from date of purchase for the full refund.