You can add up to 8 credit or debit cards to Apple Pay, and the same card can be added on up to 9 devices. The first card added to Apple Pay will be the default card. If you don’t want the first card to be the default one you can just select another by going into 'Settings', and then 'Wallet & Apple Pay'.
To add Apple Pay to your device just follow these simple steps:
first direct Mobile Banking app
Add your cards to Apple Pay directly from the first direct Mobile Banking app. Make sure you have the latest version of the app, and log in with your Digital Secure Key. Simply select the ‘More’ menu and click ‘Cards’, choose the Debit or Credit card you want to add to Apple Pay, click on the ‘Add to Wallet’ button, and follow the instructions.
iPhone
Open the Wallet app, then tap the “+” sign in the top right corner. From there, simply enter your card's security code to add your credit or debit card from your iTunes account or, select 'Add a different card' and use your iPhone camera to scan the card information, or type it in manually.
Apple Watch
Open the Apple Watch app on your iPhone and tap 'Wallet & Apple Pay'. Then select 'Add a new Credit or Debit Card'. From there simply enter your card's security code to add your credit or debit card from your iTunes account. To add a different card use your iPhone camera to scan the card information, or type it in manually.
iPad
Go into 'Settings', tap 'Wallet & Apple Pay', and tap 'Add Credit or Debit Card'. From there, simply enter your card's security code to add your credit or debit card from your iTunes account, or, select 'Add a different card' and use your iPad camera to scan the card information, or type it in manually.
MacBook Pro with Touch ID
Go to System Preferences, and select “Wallet & Apple Pay” and then “Add Card.” Enter your card’s security code to add your credit or debit card from your iTunes account. Or, select “Add a different card,” and use your MacBook Pro camera to scan the card information.