Samsung M520 Owner's Manual page 95

To turn TTY options on or off:
1.
Select Menu > Settings > More > Accessibility > TTY and
press
2.
Read the informational message and press
( ).
3.
Select TTY Off, TTY Full, TTY + Hear, or TTY + Talk and
press
Note: In TTY Mode, your phone will display the TTY access icon when a
headset or TTY device is plugged in.
If TTY mode is enabled, the audio quality of non-TTY devices
connected to the headset jack may be impaired.
WARNING
.
.
911 Emergency Calling
Qwest recommends that TTY users make emergency calls by
other means, including Telecommunications Relay Services
(TRS), analog cellular, and landline communications. Wireless
TTY calls to 911 may be corrupted when received by public
safety answering points (PSAPs), rendering some
communications unintelligible. The problem encountered
appears related to TTY equipment or software used by PSAPs.
This matter has been brought to the attention of the FCC, and
the wireless industry and PSAP community are currently
working to resolve this.
Section 2B: Controlling Your Phone's Settings
or select OK
69