Change created AppleID into one without payment
Hi.
I just created an AppleID for my boy who's using an iPod touch. Sure ... I don't want him using an account with my creditcard. However the iTunes (on my PC as well as his iPod touch) just allows me to choose between 3 creditcards. The option "None" doesn't exist.
How can I change this account (which obviously requires a creditcard before usage) into non-payment one?
Thanks!
iPod touch, iOS 5.0.1