HTC U11 - Notifications - App Light Notifications; Notifications - Flash Notifications; Notifications - Lock Screen Notifications

Device Settings 210
 Screen lock sounds: Play sounds when locking or unlocking the screen.
 Pull to refresh sounds: Play sounds when pulling the screen down to refresh content.
 Vibrate on touch: Vibrate when tapping soft keys and during certain other instances.
 Emergency tone: Set behavior when an emergency call is placed.
Notifications - Flash Notifications
Tap this option to select when you want the Front Indicator Light (LED) to light up.
1. Tap > > Settings.
2. Tap Sound & notification.
3. Tap Flash LED for notifications, and then select Always or When screen is off.
Notifications - App Light Notifications
Tap this option to select which app events you want the Front Indicator Light (LED) to light up and notify
you.
1. Tap > > Settings.
2. Tap Sound & notification.
3. Tap Manage LED notifications.
4. Tap an app for which you want to see the Front Indicator Light (LED) to light up.
Notifications - Lock Screen Notifications
These additional options let you choose how to display app notifications on the lock screen.
1. Tap > > Settings.
2. Tap Sound & notification.
3. Tap Notifications.
4. Select an app whose notifications you want to appear on the lock screen.
5. Select whether to block or to prioritize all notifications from the selected app.
6. Tap twice.
7. Tap On the lock screen, and then choose whether to show or not to show notifications.
8. Tap Notifications access to control HTC Ice View notifications.