This features lets you view the time or notification icons without turning the screen on.
The date, your signature or time, and the app notification icons are displayed on the screen even when it is off.
When an app notification is received, the current time and the icon for the app are displayed for 3 seconds.
When messages are received, message content is not displayed on the screen.
Always-on display may be disabled out of box depending on your service provider. To enable navigate to Settings> Display tab. Tap or slide the switch to on to enable.