Samsung GALAXY GRAND Prime User Manual page 122

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