1. While on an active call, press the Volume keys to adjust the call volume.
   Note: When a call is in progress, the LED indicator light will display blue. If you put the phone on speaker, the blue LED light will disappear.
   
2. To mute the microphone, press the Left Nav key.
   
3. When the microphone is muted, the Mute icon will display in the Notifications bar.
   
4. To enable speakerphone, press the Up Nav key.
   Note: Alternatively, press the 'Speaker key' on the top of the device.
   
5. When speakerphone is active, the Speaker icon will display in the Notifications bar.
   
6. To put the call on hold, press the Right Nav key.
   
7. While on hold and away from the call screen, the Hold icon will display in the Notifications bar.
   
8. For more calling options, press the Options key.