Citi cardholders can activate Apple Pay by opening the Wallet app, tapping the plus sign in the top-right corner, tapping the continue button, and positioning the credit card into the on-screen frame or entering the card details manually.
Apple Pay is accepted at thousands of locations with contactless payment systems in each country. A compatible iPhone, iPad, or Apple Watch is required.
In related news, Apple today announced that Apple Pay will soon be offered by BBVA, the second largest bank in Spain. Bankia, the fourth largest bank in Spain, also remains listed as coming soon on the localized Apple Pay page for Spain.