1. From the home screen, select Menu.
   
2. Select Settings.
   
3. Select Display.
   
4. Select Brightness.
   
5. Press the Right or Left Navigation keys to adjust the brightness of your screen as desired, then select OK.
   
6. When not in use, turn Bluetooth off.
   
7. If you are traveling and do not have access to mobile networks, switch to Airplane mode.
   Note: For additional information about charging your battery, please search tutorials for 'Charge the battery'.