I search long and hard, not for whether or not you could, you can in the US. But rather how to redeem on the iPhone itself without using iTunes on a laptop. If you do a google search you will not find the easy procedure below: Heres what you do: open the App Store app on the iPhone, go to the Featured tab, scroll to the bottom, and tap Redeem. Now, type in the code on the back of the card. And then it will ask you to sign in. It automatically knows you amount. Then when you go to buy it takes it off the gift card total. Hopefully this helps someone.