What is RTT/TTY?
RTT (real-time text) allows you to send text messages with a recipient during a phone call. RTT can also be used with a TTY (teletypewriter) device.
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
- Go to Settings > Accessibility > RTT/TTY.
- Turn on Software RTT/TTY or Hardware TTY.
- Tap Relay Number and enter a phone number for RTT/TTY relay calls.
- RTT/TTY sends characters immediately as you type them. If you don't want to send text as you type, turn off Send Immediately to send full messages after you're done typing.
- To answer every call as RTT/TTY, turn on Answer All Calls as RTT/TTY.*
- 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.
Make or receive RTT/TTY phone calls
- Open the Phone app.
- Select your contact and tap their phone number.
- Select RTT/TTY or RTT/TTY Relay.
- Wait for the call to connect, then select RTT/TTY.
- 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 the Send button 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."
Find a transcript of a previous RTT/TTY call
- Open the Phone app.
- Tap Recents.
- Tap the More Info button next to the call that you want to see. RTT/TTY calls have a telephone icon next to them.
- Tap the Outgoing Call or Incoming Call history.
- You'll see a transcript of the call.