1. While on an active call, press the Volume keys to adjust the call volume.
   
2. Press the Center Nav key to toggle speakerphone on or off.
   
3. Press the Right Soft key to toggle mute on or off.
   
4. To access additional options, press the Left Soft key.
   
5. Scroll to the desired option, then press the Center Nav key.
   
6. To return to the home screen, press the Task key.
   
7. Scroll to the Home Screen icon, then press the Center Nav key.
   
8. To return to the active call, press the Task key.
   
9. With Call selected, press the Center Nav key.