HTC Smart User Manual page 56

6 Chapter  Phone Calls
During a call, you can do any the following:
To
Put a call on hold
Unhold a call
End a call
Access the Phone
dialer keypad
. Handling Multiple Calls
When there is another incoming call while
you are already in a call, you will hear a
notification sound from the earpiece and see
a new incoming voice call screen.
Do this
Press the CALL button. You can also press
MENU, and then tap Hold call.
When a call is on hold, press the CALL
button. You can also press MENU, and then
tap Unhold call.
Press the END CALL/POWER button.
When you need to access the Phone dialer
keypad (for example, if you want to enter
an extension number), tap Keypad ( ).