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When vibration is turned on, your device vibrates when you get a message. Follow these instructions to turn vibration on or off.
1. Find "Sound"
Press the menu icon.
2. Turn vibration on or off
Press Vibrate and ring to turn vibration on or off.
When the box next to the menu item is ticked (V), vibration is turned on.
Press the home icon to return to standby mode.