To use Apple Pay®, your iPhone 6 or iPhone 6 Plus iPhone must be running iOS 8.1 or above, and you must have an iCloud account. To make a purchase at a retailer that has a contactless payWave terminal, hold your device over the terminal and accept the charge with your fingerprint or passcode when prompted. A subtle vibration and beep lets you know the purchase was successful.
If asked to verify the last four digits of your card number when making a purchase, instead provide the last four digits of the device account number. The device account number can be found by selecting the ⓘ icon while viewing your card in Passbook. You may also be asked to provide a signature or debit card PIN to complete your transaction.*