Open the Wallet app on your iPhone
Tap the plus sign
Tap Debit or Credit Card
Tap Continue
Use your iPhone camera to scan your card or enter the card details manually
Follow the on-screen instructions from your bank or card issuer
Verify your card if prompted
Set up Face ID, Touch ID, or your passcode if required
Wait for the card to be added to Wallet
Use Apple Pay by double-clicking the side button or Home button and authenticating before paying