Notifications; Notification Led - HTC 10 User Manual

HTC 10 not responding?
If HTC 10 does not respond when you touch the screen or press the buttons,
you can still restart it.
Press and hold the POWER and VOLUME DOWN until your phone vibrates,
and then release the buttons.
You may need to press and hold the buttons for 12 to 15 seconds
before the phone vibrates.

Notifications

Notification LED

The notification LED shows a:
Your first week with your new phone 51