1. Press the Right Soft key to mute/unmute the microphone during a call.
   
2. Press the Center Nav key to enable or disable speakerphone.
   
3. Press the Volume keys to adjust the volume.
   
4. To access more options, press the Left Soft key.
   
5. Select the desired option, then press the Center Nav key.
   
6. To access the home screen, press the Left Soft key.
   
7. Select Goto, then press the Center Nav key.
   
8. Scroll to and select Main Menu, then press the Center Nav key.
   
9. To return to the call in progress, press the Right Soft key.
   
10. Press the End key to hung up.