HTC Desire 820 User Manual page 147

147 Wireless sharing
You can also use NFC for contactless payment. Availability of NFC payment depends
on when your mobile operator launches this service. Contact your mobile operator for
details.
Turning NFC on or off
1. Go to Settings, and then under Wireless & networks, tap More.
2. Tap the NFC On/Off switch to turn it on and off.
Beaming content
Make sure that both devices are unlocked and have NFC turned on. If the other
device has an Android Beam™ option, make sure it is also turned on.
1. While viewing the content that you want to share, hold HTC Desire 820 and the
other phone back to back.