How to create apple id on iphone without credit card?

I already created it, and there was no payment section. When i wanted to install some free application a popup shows and tells me sign in or create an apple id, so i sign in and another popup says that this account has not yet been used in the itunes store tap review to sign in and the payment section comes up but there's no none button.

Apple requires either a credit card or iTunes/Apple gift card to open an account.

Once an account is open, a credit card can be removed and the account will function fine with no money, so you can download free Apps.

Http://support.apple.com/kb/HT2534

I was creating my apple id and it was successfull. But when i'm downloading they want to review my account and look for the credit card. And there's no "none" in the selection. What should i do?