Samsung PM-A740 - Manual (Page 39)

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Basics
TTY Use With Sprint PCS Service
A TTY (also known as a TDD or Text Telephone), is a
telecommunications device that allows people who are
deaf or hard of hearing, or who have speech or language
disabilities, to communicate by telephone.
Your phone is compatible with select TTY devices. Please
check with the manufacturer of your TTY device for
connectivity information and to ensure that the TTY
device supports digital wireless transmission.
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 mode on or off:
1. Press .
2. Press to continue.
3. Press up or down to select Enable TTY or Disable
TTY and press .
For additional information and instructions regarding
TTY use, please see your phone’s online User’s Guide at
www.sprintpcs.com .
IMPORTANT
NOTICE: 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.