Setting payment method
Put in valid credit card and gives me an invalid payment type.
iPhone 8 Plus, iOS 14
Put in valid credit card and gives me an invalid payment type.
iPhone 8 Plus, iOS 14
Have you given thought to updating to iOS 15?
These links may help - Payment methods that you can use with your Apple ID - Apple Support
If your payment method is declined in the App Store or iTunes Store - Apple Support
Change, add, or remove Apple ID payment methods - Apple Support
Setting payment method