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7.4.3 You can adjust the buzzer/ringer mode according to your needs
Press on the ringer/vibrate key.
Off: Ringer and buzzer are deactivated.
Ring only: Rings only.
Vibrate then ring: The handset vibrates and then rings.
Vibrate only: The handseibrates anddoesn 't ring.
Vibrate and ring: The handset vibrates and rings simultaneously.
This key can be used to switch rapidly from the ringer to the vibrate mode and vice-versa.
7.5 Activating headset mode
You can use a headset with your phone. If you want the headset to ring only when receiving an incoming
call, you must activate the headset mode:
When activated only the headset rings (if plugged in).