Apple Pay allows people to pay from a debit or credit card wirelessly using NFC technology. It is available for use on iPhone SE, iPhone 6, iPhone 6 Plus, iPhone 6S, iPhone 6S Plus, iPhone 7, iPhone 7 Plus, and Apple Watch devices.The entire process is incredibly secure; vendors never see your real credit card number.

Apple Pay is not currently available in South Korea, although Apple is in discussions to change that. If you use a U.S.-issued credit card with Apple Pay, some Korea-based vendors are able to accept this as payment.