To display the latest numbers from standby mode, press and hold the CALL key 
. To directly dial a number on the list, select the contact with the DIRECTION Key 
then press the CALL key 
again.
Send the DTMF
When DTMF (Dual Tone Multiple Frequency) function is set, the numeric key you entered from the keypad and key will be transmitted to the recipient as DTMF tone.
Mute Function
To mute the microphone during a call, press the Right Soft Key. “Call Mute” will appear in the lower right corner of the screen, and the person you’re speaking with won’t be able to hear you, but you will be able to hear him. To enable the microphone, press the Right Soft Key again. To end the call, press the POWER KEY
.
Call Waiting
Call Waiting notifies you of an incoming call when you are on the phone by sounding a beep and displaying the caller’s phone number on the screen. This service is system dependent. Contact your service provider for additional information. To display the following menu options during a call, press the Left Soft Key 
:
!Volume: To adjust sound volume.
Hold: To place an ongoing call on hold, then make another
call.
!
!Hang up: To end the current call.
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