1. While on an active call, press the Volume keys to adjust the in-call volume.
   
2. Tap Speaker to enable speakerphone, tap again to disable.
   
3. Tap Mute to mute the call, tap again to disable.
   
4. Tap Hold to put the caller on hold, tap again to resume the call.
   
5. Tap Dialpad to bring up the numerical keypad.
   
6. Tap Add call to include another caller.
   
7. To access the home screen while on a call, press the Home key.
   
8. To return to the ongoing call, tap the Call icon.
   
9. Tap End to end the call.