Apple® iPhone® - Manage TTY Settings

Note Notes:

  • When TTY (teletypewriter) settings are enabled, you can use your phone with a TTY device if you're deaf or hard of hearing.
  • The steps below apply to the iPhone 5, iPhone 5c and iPhone 5s.
  • Check the applicable instructions for the iPhone 4 or iPhone 4s.


  1. From a Home screen, navigate: Settings Settings icon > General > Accessibility.
  2. From the 'HEARING' section, tap TTY.
  3. Tap the following switches to turn on Switch On or off Switch Off:
    • Software TTY: Allows you to make and receive TTY phone calls using iPhone software without the need for additional hardware.
    • Hardware TTY: Allows you to connect to an external device for TTY calls.