Phone Settings; Tty Mode - Samsung Galaxy S9 User Manual

Phone Settings

These settings allow you to modify settings associated
with the Phone app.
1. From a Home screen, swipe up to access Apps.
2. Tap Phone > More options > Settings.
3. Tap an option and follow the prompts.
Apps

TTY Mode

A teletypewriter (TTY), is a telecommunications device
that allows people who are deaf, hard of hearing, or
who have speech or language disabilities to
communicate by telephone.
1. From a Home screen, swipe up to access Apps.
2. Tap Phone >
3. Tap More settings > TTY mode.
4. Tap TTY OFF, TTY FULL, TTY HCO, or TTY VCO.
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More options > Settings.