1. Parts and Names< SMT-i6021, SMT-i6020>< SMT-i6011, SMT-i6010 >Navigation Button- OK button: Selects and confirm menu- Direction key: Navigates menuOKDirection keyPhone Status IndicatorProgram keySoft buttonDirection keyOK buttonBack buttonVolume buttonDial buttonSpeaker buttonLCD screenHandsetMenu buttonContacts buttonTransfer buttonMessage buttonHold buttonConference buttonRedial buttonHeadset buttonMute buttonMove buttonPhone Status IndicatorProgram keySoft buttonDirection keyOK buttonBack buttonVolume buttonDial buttonSpeaker buttonLCD screenHandsetMenu buttonContacts buttonTransfer buttonMessage buttonHold buttonConference buttonRedial buttonHeadset buttonMute buttonMove buttonNavigation Button- OK button: Selects and confirm menu- Direction key: Navigates menuOKDirection key