How to set up TTY mode on iPhone

iPhone users who have hearing or speech difficulties can communicate using TTY (text telephone) mode and RTT (real-time text) mode without the need of having any extra hardware. In addition, the users can easily find all of the transcripts of the calls they had.

However, these modes are not supported in all countries and are also not supported by all carriers. We are going to show you how you can enable these modes, and if they are supported, the standard rates apply.

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Steps to set up TTY mode

To set up TTY mode on your iPhone, follow the steps below:

  • Open the Settings app on your device
  • Go to Accessibility
  • Tap RTT/TTY or TTY
  • Enable Software RTT/TTY or Software TTY
  • Next, tap Relay Number
  • Type the number for RTT/TTY calls
  • If you want the characters you are typing to be sent right away as you type them, enable Send Immediately. Disable Send Immediately if you want to type full messages before sending.
  • Enable Answer All Calls as RTT/TTY so that you can answer every call with RTT/TTY

Steps to make TTY mode calls

To make TTY mode calls, follow the steps below:

  • Open the Phone app on your iPhone
  • Type the phone number you want to call or select the contact from your contact list
  • Next, select RTT/TTY Relay or RTT/TTY
  • When the call connects, select RTT/TTY
  • Now enter your message

Steps to find transcripts of calls you had

  • Open the Phone app on your iPhone
  • Next, tap Recents
  • Tap the i button
  • All of the TTY and RTT calls will have a phone icon
  • Tap on incoming or outcoming history to access the transcripts of previous calls.

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