Why do I have to put a credit card in when i have an iTunes card
Why is a credit card required when I use an iTunes gift card?
iPhone 4
Why is a credit card required when I use an iTunes gift card?
iPhone 4
Without details it's impossible to know. Is this a new account ? Did you use the instructions on this page when creating the account : Create an iTunes Store, App Store, or iBooks Store account without a credit card or other payment method - Apple Support ?
Why do I have to put a credit card in when i have an iTunes card