HTC 10 User Manual page 245

Beaming content
Make sure that both devices are unlocked and have NFC turned on. If the
other device has an Android Beam
1. While viewing the content that you want to share, hold HTC 10 and the other
phone back to back.
Make sure that the NFC area (shaded part) of HTC 10 and the other phone's
NFC area are close to one another. Experiment by slightly moving the phones
until a connection is made.
™
option, make sure it is also turned on.
Wireless sharing 245