Why wont my iPhone let me change my card?
If you can't edit your payment information Try updating to the latest version of iOS or iPadOS or macOS. If you have subscriptions, have an unpaid balance, or share purchases with your Family Sharing group, you can't remove all payment information. Get help if you want to use no payment method with your Apple ID.Mar 2, 2021
How do I change my payment card on my iPhone?
It's possible your current payment method has expired and needs to be updated. If you recently got a new credit card, you may only need to update your card's expiration date and CVV number! Open Settings and tap on Your Name at the top of the screen. Then, tap Payment & Shipping and enter your Apple ID password.Jan 11, 2019