How to add a debit card in apple wallet

In the Wallet app, tap the Add button.

• Tap Debit or Credit Card to add a new card.

1. Tap Continue.
2. Follow the steps on the screen to add a new card.
3. Verify your information with your bank or card issuer. They might ask you to provide more information or to download an app before approving your card for use with Apple Pay.

If you still can't add a card to Apple Wallet to use with Apple Pay:

1. Check that you're able to use Apple Pay:

• • Contact your card issuer to see if they support Apple Pay.
  • Update to the latest version of iOS , watchOS or macOS.
  • Confirm that you have Face ID, Touch ID or a passcode set on your device. 
  • Make sure you're in a supported country or region.
  • Check that your device is compatible with Apple Pay.

1. Check for service outages or connection issues.
2. Contact your bank or card issuer if you see the following error messages while adding your card to Apple Wallet: 

• • Could Not Add Card 
  • Invalid Card 
  • Card Device Limit 

References:

Apple Support Article 01

Apple Support Article 02

If you get the Learn More dialog box that takes you to the support document you posted from when you tap the (➕) icon in the Wallet App, make sure your iPhone is set to a country where Apple Pay is supported in Settings ➜ General ➜ Language & Region ➜ Region. click here ➡️ Countries and regions that support Apple Pay - Apple Support