TTY
The teletypewriter (TTY) is a telecommunications device that allows people who are deaf or hard of hearing, or who have speech or language disabilities, to communicate via a telephone.
Setting teletypewriter ADV
1.Press Menu > Settings > TTY.
2.Select Disabled, TTY Full, TTY Talk, or TTY
Hear.
•Disabled: TTY mode is disabled.
•TTY Full: User who cannot talk and hear send and receive a text message.
•TTY Talk: User who can talk but cannot receive a text message and send voice message.
•TTY Hear: User who can hear but cannot talk send a text message and receive voice message.
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Settings 
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