Final answer:
The correct way to use NFC with Apple Pay is to hold the iPhone on the payment terminal for at least 3 seconds to allow sufficient time for a connection to be established.
Step-by-step explanation:
To properly use NFC for payment with Apple Pay on an iPhone, the user should hold the phone on the payment terminal for at least 3 seconds. Quick tapping may not allow enough time for the NFC (Near Field Communication) technology to establish a connection with the payment terminal. It's important to ensure that the iPhone is awake and that the Wallet app is open or that the default card is ready for use.
Additionally, the user should check if the NFC feature is enabled and that Apple Pay is set up with the correct card information. If issues persist, restarting the device, re-adding the credit or debit card, or contacting the financial institution for any blocks or issues could resolve the problem. Avoid options such as holding the phone too far from the terminal or turning on airplane mode, as these will not aid in the payment process. Instead, always keep the iPhone's screen facing the contactless reader and within an inch of the terminal to allow for the best connectivity.