Turn Notifications On / Off - Blocking Mode - Samsung Galaxy Note® II
From a Home screen, tap Apps (located in the lower right).
From the Apps tab, tap Settings.
From the Device section, tap Blocking mode.
Ensure that the Blocking mode switch (located in the upper right) is turned on .
From the Features section, select any of the following: Selected when a check mark is present.
Block incoming calls Calls from contacts or phone numbers not added to the Allowed contact list are automatically ignored. An incoming call notification is not displayed and the caller is forwarded to voice mail.