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Tty App

TTY-based Telecommunications Relay Services permit persons with a hearing or speech disability to use the telephone system via a text telephone (TTY) or other device to call persons with or without such disabilities. To make using TRS as simple as possible, you can dial 711 to be automatically connected to a TRS communications assistant. TTY technology gives the deaf and hard of hearing a text-based system for communicating over phone lines among themselves or with hearing individuals. Starting in the 1960s, hearing -impaired telephones that used this technology made the deaf and hearing impaired less isolated.

This feature is available for plans from carriers in the United States and Canada only. Standard voice call rates apply for both Software and Hardware RTT/TTY calls. Depending on your carrier, you might see RTT, TTY, or RTT/TTY.

Set up RTT/TTY

Tty App For Iphone

  1. Go to Settings > Accessibility > RTT/TTY.
  2. Turn on Software RTT/TTY or Hardware TTY.
  3. Tap Relay Number and enter a phone number for RTT/TTY relay calls.
  4. If you want to send characters as you type them, turn on Send Immediately. Or to type full messages before you send, turn off Send Immediately.
  5. To answer every call as RTT/TTY, turn on Answer All Calls as RTT/TTY.*
  6. If you want to answer and make RTT/TTY calls from an external RTT/TTY device instead of your iPhone, turn on Hardware TTY.

* If you turn on Answer All Calls as RTT/TTY, you won't get voice calls anymore.

Tty App

Make or receive RTT/TTY phone calls

  1. Open the Phone app.
  2. Select your contact and tap their phone number.
  3. Select RTT/TTY or RTT/TTY Relay.
  4. Wait for the call to connect, then select RTT/TTY.
  5. Enter your message:
    • If you turn on Send Immediately in Settings, your recipient sees your message as you type.
    • If not, enter your message, then tap to send.
    • Want to find shortcut phrases? Wait a moment before you type your message and shortcuts appear, like SK for 'Ready to hang up' and GA for 'Go ahead.'
Tty application


Tty Cell Phone App

Find a transcript of a previous RTT/TTY call

How To Use Tty Phone

  1. Open the Phone app.
  2. Tap Recents.
  3. Tap next to the call that you want to see. RTT/TTY calls have a telephone icon next to them.
  4. Tap the Outgoing Call or Incoming Call history to see a transcript.