Samsung Galaxy S6 edge User Manual page 149

Tap and Pay
Tap and pay allows you to select the default payment
application you want to use for making on-phone
purchases.
1. From a Home screen, tap Apps > Settings >
NFC and payment.
2. Tap NFC, and tap ON/OFF to turn NFC on.
3. Tap Back arrow > Tap and pay.
4. Select the app that you want as your default.
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Settings NFC and Payment