LG US780 - Manual (Page 36)

36
Calls
TTY mode – Allows you to set the TTY mode to communicate with
other TTY devices.
DTMF tones – Set the length of DTMF tones.
Auto answer – Enable Auto answer with Handsfree.
Call restrictions – Set the call restrictions options.
Call duration – Allows you to view the call duration.
Voice privacy – Checkmark to enable enhanced privacy mode.