Samsung SCH-N330PWVXAR - Manual (Page 122)

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TTY/TDD
Your phone is fully TTY/TDD compatible. TTY/TDD
equipment is connected to your phone through the headset
connector on the left side of the phone. TTY/TDD must be
enabled before you can use your phone with a TTY/TDD
device.
1. In standby mode, press the left soft key ( ) Menu , then
press , . TTY/TDD Lock appears in the display.
2. Enter the lock code. The default is , , ,
(or #TTY). TTY Full and TTY Off appear in the
display.
3. Use the navigation key to highlight your selection, then
press
. You’re returned to the Sounds menu.
The TTY icon ( ) appears in the top of the display when
the phone is in standby mode.