Can't add Apple ID payment method
Need to add payment method to my iPhone
[Re-Titled by Moderator]
iPhone 11, iOS 16
This document explains how to add a payment method to your Apple ID on a Mac, Apple mobile devices, PC, or online --> Add a payment method to your Apple ID - Apple Support
On an iPhone or iPad (note that the details may vary slightly depending upon which iOS version you are running) :
1. Open the Settings app.
2. Tap your name.
3. Tap Media& Purchases (formerly Payment & Shipping). You might be asked to sign in with your Apple ID.
4. Tap Manage Payments. If using an older iOS version you might not see this step.
5. Tap Add Payment Method. Enter the new payment method, then tap Done.