Samsung SGH-i717 User Manual page 37

Place the centre of the rear near an NFC tag. When the writing is complete,
4
a notice will appear on your device's display.
› ›
Make a purchase with the NFC feature
Before you can use the NFC feature to make payments, you must register for
the mobile payment service. To register or get details about the service,
contact your service provider.
To make a purchase with the NFC feature,
1
Place the centre of the back cover near an NFC card reader.
2
When prompted, enter your PIN and place your device near again (if
necessary).
※ The Rear cover supplied with this phone contains a specific NFC antenna.
This is the only battery cover that comes with the device.