How can I add a debit card to my iPhone Wallet app?

Try the following:

• Be sure to activate your card before attempting to add it to Apple Wallet by contacting your bank.
• Be sure the card has not expired.
• Be sure to verify all information on the card matches exactly.

—Apple Pay Support—

• Set up Apple Pay.
• Pay Participating Banks.
• Can’t add a card to Apple Wallet.

If none of those work, then try linking the payment method:

Open Settings ➢ your name at the top of the list ➢ Payment & Shipping ➢ Add Payment Method.

Once the payment method has been added, you should have the option to link it to Apple Pay.

Need more help?

• Chat now or call 1-800-APLCARE.
• International Support.

See the following Apple articles:

Set up Apple Pay

Set up Apple Pay - Apple Support

Countries and regions that support Apple Pay

Countries and regions that support Apple Pay - Apple Support (EG)

Set up Apple Pay in Wallet on iPhone

Set up Apple Pay in Wallet on iPhone – Apple Support (UK)

Apple Pay participating banks in Africa, Europe, and the Middle East

Apple Pay participating banks in Africa, Europe, and the Middle East - Apple Support

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

If you can't add a card to Apple Wallet to use with Apple Pay - Apple Support

See also -> About billing for Apple subscriptions and media products in India

About billing for Apple subscriptions and media products in India - Apple Support

India

•           Apple ID balance (from adding funds)

•           Net Banking (adding funds only)

•           UPI (adding funds only)

Then use / pay with your Apple ID balance, see: Add money to your Apple ID balance

Add money to your Apple ID balance - Apple Support (IN)