During a call, select Options to see the in-call menu choices:
Lock keys—Lock the phone keypad during a call.
Mute—Mute the phone microphone. This option can affect the microphones of accessories
connected to the phone.
End all calls—End all active calls.
Touch tones—Send touch tones.
New call—Make a call while you have a call in progress.
Menu—Access the menus.
Contacts—Access the contact list.