If you don't see the Apple Pay logo on or near the point-of-sale terminal ... Follow these steps to restart your iPhone: Press and hold the side button and either the up or down volume button ...

Apple Pay is a secure mobile payment service that becomes even more useful with the addition of Apple Cash and Apple Card.

Look for the Apple Pay logo or contactless payment symbol at checkout ... Hold down the power button and volume button (on iPhone X or later). Swipe “Slide to Power Off” and wait about ...