12- To mute the microphone, press the M soft key (the last application key).- To silent the key tones, press the K soft key (the third application key).- To use 2 or 3way call, press the TALK key during a call, and then enter anothernumber then TALK or 2/3 soft key.- Call waiting: When you get another call during a call, press the S(Switch) softkey to switch two calls.Call Logs1. Press the TALK key.2. Choose one of the call logs among All, incoming, outgoing and missed.3. Press the TALK key to make a call to the number. Or,Press the Details soft key to view the detail information of the number. Or,Press the Done soft key to go back to the previous screen. Or,Press the Delete All soft key to delete all items of selected logs.Address Search1. Press the Address application.2. Choose one of the options among by number, by name or by company.3. You can make a call to the number or edit the item.Phone PreferencesSoundsYou can adjust the volume, tone or type.DisplayBacklight: Always On / 7sec / 15 sec / 30 sec / Always OffGreeting: My Phone Number / Custom (Editable) / Username (NAI)Idle Screen: Wall Paper / My Special List / Mail Box / Big ClockSetup/Data ServiceCall: Auto Answer/Call Answer/Message popup/Enable auto-off of display during call