Can't add payment method on iphone

- Can't add new payment method on iphone
- Add payment method on iphone
- Iphone can't add payment method
- I can't add a payment method on my iphone
- Why can't i add a new payment method on my iphone
- Can not add payment method on iphone
- Why can't i add payment method on iphone family sharing
- Add payment method on iphone greyed out
- Why can't i add another payment method on iphone
- Why can't i add or remove payment method on iphone