Go to Settings > Connected devices > Connection preferences.
Tap NFC and make sure it's on.
Tap Contactless payments and adjust settings:
To change payment apps, tap Default payment app and select the app.
If you have multiple payment apps, tap Use default payment app, then chose when to use your default app (always or except when another payment app is open).
NoteThis feature manages payment apps. It doesn't include money transfer apps.
Make a payment
Make sure NFC is on and that the terminal has this symbol:
Unlock your phone and tap its back to the terminal.
Your payment app might require you to open the app and enter a PIN before touching your phone to the terminal.