Samsung VGA1000 - Manual (Page 45)

Section 2: Understanding Your PCS Phone
2B: Controlling Your Phone’s Settings
37
To turn TTY Mode on or off:
1. Press
2. Press again to continue.
3. Press the navigation key up or down to select Enable TTY
or Disable TTY and press .
Note: In TTY Mode, your phone will display when a device is
connected.
Note: If TTY mode is enabled, the audio quality of non-TTY devices
connected to the headset jack may be impaired.
IMPORTANT NOTICE: 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.