First click the menu button.
After this select Basic.
Then scroll down to display.
Here you will see the options to set everything up like you desire.
On the bottom of your screen the DND will be an option for you to press.
If you find yourself in a important meeting or simply needing a few minutes of quiet time you can simply press the DND but...
Hold down the OK button for 10 seconds until you see the reset screen pop up on your phone as seen below.
Simply press the OK button once more and the phone will reboot.
To change your ringtone for a sound that better fits you just follow these easy steps.
1. Hit the menu button
2. Press the Basic button
3. Go to Sound
4. Choose Ring tones
5. Once in Rington...