How to Disable TTY on an iPhone

Co-authored by wikiHow Staff

Last Updated: May 15, 2018

This wikiHow teaches you how to turn off the iPhone's user-enabled function allowing hearing- or speech-impaired users to place and receive text-assisted calls.

Steps

1
Open your iPhone's Settings. It's a gray app containing an image of sprockets. It is on one of your home screens or, if not, it may be in a folder labeled Utilities.
2
Tap General. It's next to a gray icon containing a gear in the third section of the menu.

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3
Tap Accessibility. It's a stand-alone section of the menu.
4
Scroll down and tap TTY. It's the second selection in the "Hearing" section of the menu.
5
Slide the button next to Software TTY to the Off position. The white button should be toward the left and surrounded by white. Doing so means you will no longer be able to place or receive TTY calls using the Phone app.
6
Slide the button next to Hardware TTY to the Off position. The white button should be toward the left and surrounded by white. Doing so prevents you from making or receiving iPhone calls using an external TTY device.