Samsung Gear S3 SM-R760 - Manual (Page 85)

Applications
85
Making payments 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 more information about the service, contact your service
provider.
1
On the Settings screen, tap Connections → NFC and then tap the NFC switch to activate
it.
2
Touch the NFC antenna area at the top of the Gear’s touchscreen to the NFC card reader.
To set the default payment app, open the settings screen and tap Connections → NFC →
Tap and pay, and then select an app.
The payment services list may not include all available payment apps.
NFC antenna