I have a 25.00$ iTunes card and can't use it for App Store purchases?
I have a iTunes gift card and can't purchase apps with it. what's going on exactly?
iPad (3rd gen) Wi-Fi, iOS 6.0.2
Have you redeemed it in your iTunes account?
Is the gift card from the same country as your iTunes account?
What have you tried? What happened? What is the exact wording
of any error messages?
Need some more details so someone can suggest a course of action.