From the manual (straight cut and paste, so sorry about the formatting)
Activate the NFC feature
In the application list, select Settings→ More settings→
NFC.
› Read information from an NFC tag
Once you activate the NFC feature, your device will read
product information when you place it near an NFC tag. The
information from the tag will appear on your 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.
1 Touch the back of your device to the NFC card reader.
2 When prompted, enter your PIN and touch your device to
the NFC card reader again (if necessary).138
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› Send data via Android Beam
With the Android Beam feature, you can send data, such as
webpages and contacts, to NFC-enabled devices.
1 In the application list, select Settings→ More settings→
Android Beam.
2 Drag the Android Beam switch to the right.
3 Open a webpage or select an item from an appropriate
application.
4 Touch the back of your device to the back of the other
device.
5 Tap your device’s screen.
The data on your device will be sent and displayed on the
screen of the other device.
› Send data via S Beam
With the S Beam feature, you can send data, such as music,
videos, images, and documents.
Do not send copyright-protected data via S Beam.
Doing this may violate copyright laws. Samsung is not
responsible for any legal issues caused by the user’s
illegal use of copyrighted data.
1 In the application list, select Settings→ More settings→
S Beam.
2 Drag the S Beam switch to the right.
3 Launch an application that uses music, videos, images, or
documents.
4 Open or play a file.139
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5 Touch the back of your device to the back of the other
device.
6 Tap your device’s screen.
The data on your device will be sent and displayed on the
screen of the other device.
If the two devices try to send data simultaneously, the
file transfer may fail.