Step 1 
Press the settings button.
Step 2 Press the Scroll key to highlight Call Preferences.
Step 3 Press the Select softkey.
Step 4 Press the Scroll key to highlight Do Not Disturb from the Call Preferences menu.
Step 5 To enable the Do Not Disturb feature, press the Yes softkey. To disable this feature, press the No softkey.
Step 6 Press the Save softkey to save your selection of this feature and displays the Settings menu.
Step 7 Press the Back softkey to display the main LCD screen. A Do not disturb message is displayed on the LCD screen.