Samsung A640, Instruction Manual, Page: 84 / 265

62 Section 2B: Controlling Your Phone’s Settings
When establishing your Sprint PCS Service, please call Sprint
Customer Service via the state Telecommunications Relay
Service (TRS) by first dialing
. Then provide
the state TRS with this number: 866-727-4889.
To turn TTY Options on or off:
1.
Press Menu > Settings > Others > TTY Mode from standby
mode. (An informational message is displayed.)
2.
Press .
3.
Select TTY Off , TTY + Hear , TTY+ Talk , or TTY Full 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
Sprint 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.