I’m unable to add card in wallet app how can I add

Verify that BOTH your region and your card issuer support ApplePay.

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

Apple Pay participating banks in Canada, Latin America and the United States – Apple Support (AU)

Abhiram24 Said:

"How can I add card in wallet app. I’m unable to add the card it shows a pop up for learn more but it isn’t allowing to add the card"

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Troubleshooting Apple Wallet:

Are you saying that a card as a method of payment is "declined"? If so, go here: If your Payment Method is Declined in the App Store or iTunes Store - Apple Support