Alcatel Tetra User Manual page 22

Using the Notifications panel
Touch and drag the Status bar down to open the Notifications panel.
Drag down once again to enter the Quick settings panel. When there are
notifications, you can touch them to access notifications directly.
Notifications panel
When there are notifications, touch and drag down the Status bar to open
the Notifications panel to read more detailed information.
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Switch to the Quick settings panel.
Clear all events–based notifications (other
ongoing notifications will remain).