How do I update credit card info

Please follow the steps in the outline below. You can click the link below for additional information and different devices.

Update your payment method on your iPhone or iPad

1. Open the Settings app.
2. Tap your name.
3. Tap Payment & Shipping. You might be asked to sign in with your Apple ID.
4. Tap Add Payment Method, enter the new payment method, then tap Done.
5. Tap Edit.
6. Tap the red delete button next to the old payment method, then tap Delete.

If you need to change or update your Apple ID payment method - Apple Support

Are you trying to update a card in Apple Wallet on your iPhone? If not, where is the card you want to update?