Quiet mode turns off all sounds except alarm, music, video and games. Only calls from your allowed contacts will ring.
From the Home screen, tap Apps > Settings > Sound tab > Quiet mode
To manually activate Quiet mode, tap Turn Quiet mode on now
To schedule when Quiet mode activates, tap Set quiet time. Tap to enable adjustment of Time and Days. Quiet mode will activate automatically at scheduled time. The mode appears off until then. Tap Back key to return to main screen.
To change call settings, tap Incoming call settings. From here you can allow a second call from the same person within 3 minutes to ring, set allowed contact numbers to ring, and set automatic replies to blocked calls all while in Quiet mode.
Note: Allow repeated calls, Allowed contact lists and auto reply settings are grayed out unless Block incoming calls is checked .