Use Apple Pay for contactless payments on iPhone
With your Apple Cash, Apple Card, and other credit and debit cards stored in the Wallet app on iPhone, you can use Apple Pay for secure, contactless payments in stores, restaurants, and more. (Available in certain countries and regions; see Countries and regions that support Apple Pay.)
Find places that accept Apple Pay
You can use Apple Pay wherever you see contactless payment symbols such as the following:

Siri: Say something like: “Show me coffee shops that take Apple Pay.” Learn how to use Siri.
Pay with your default card on an iPhone with Face ID
Double-click the side button.
When your default card appears, glance at iPhone to authenticate with Face ID, or enter your passcode.
Hold the top of your iPhone near the card reader until you see Done or a checkmark on the screen.
Pay with your default card on an iPhone with Touch ID
Rest your finger on Touch ID.
Hold the top of your iPhone near the card reader until you see Done or a checkmark on the screen.
Pay with a different card instead of your default card
When your default card appears, tap it, then choose another card.
Authenticate with Face ID, Touch ID, or your passcode.
Hold the top of your iPhone near the card reader until you see Done or a checkmark on the screen.
Use a loyalty or rewards card and Apple Pay
At participating stores, you can receive or redeem rewards when you use Apple Pay.
Add your rewards card to the Wallet app.
To have your rewards card appear automatically when you’re in the store, tap
on the card, tap Pass Details, then turn on Automatic Selection.
At the payment terminal in the store, present your rewards card by holding iPhone near the contactless reader.
Apple Pay then switches to your default payment card to pay for the purchase. In some stores, you can apply your rewards card and payment card in one step. In other stores, you need to wait until the terminal or cashier asks for payment.
Note: If you have Location Services turned on, the location of your iPhone at the time you make a payment may be sent to Apple and the card issuer to help prevent fraud. See Control the location information you share on iPhone.