What Does RTT Mean on iPhone: A Comprehensive Guide

What Does RTT Mean on iPhone: A Comprehensive Guide


If you’re an iPhone user, you may have come across the term “RTT” and wondered what it means. RTT stands for “Real-Time Text” and is a communication feature that allows users to send and receive instant text messages during a phone call. In this comprehensive guide, we will explore what RTT means on the iPhone and how you can use this feature to enhance your communication experience.

Understanding RTT

RTT is a feature that enables real-time text messaging during a phone call. It allows users to type and send messages instantly, which are displayed on the recipient’s screen as they are being typed. This eliminates the need to wait for the other person to finish talking before responding, making conversations smoother and more efficient.

How to Enable RTT on iPhone

Enabling RTT on your iPhone is a straightforward process. Follow these steps to activate the feature:

1. Go to your iPhone’s Settings.
2. Scroll down and tap on “Accessibility.”
3. Select “RTT/TTY.”
4. Toggle the switch to turn on “Software RTT/TTY.”
5. A prompt will appear, informing you that your phone calls may be recorded. Confirm the settings to proceed.

Using RTT During a Phone Call

Once you have enabled RTT on your iPhone, you can use it during a phone call as follows:

1. Dial the phone number of the person you want to call.
2. After the call is connected, tap on the “RTT” button that appears on the call screen.
3. A text box will appear at the bottom of the screen. Type your message in this box and tap “Send” to instantly send it to the recipient.
4. The recipient will be able to see your message displayed on their screen in real-time.
5. To respond, they can either type their message in the text box or use voice input.

Benefits of RTT

RTT offers several benefits that can enhance your communication experience on the iPhone:

1. Improved accessibility: RTT allows individuals with communication disabilities to participate in phone conversations effectively.
2. Instant messaging: With RTT, you can send and receive text messages in real-time, making conversations more efficient.
3. Multitasking: RTT enables you to communicate through text while simultaneously listening to the other person’s voice, allowing for a seamless conversation flow.
4. Privacy: RTT messages are displayed only on the recipient’s screen, ensuring that sensitive information remains confidential.

Limitations of RTT

While RTT is a useful feature, it has some limitations to be aware of:

1. Both parties need RTT support: To use RTT during a phone call, both the caller and the recipient must have devices that support RTT.
2. Compatibility: RTT is not supported by all carriers and may not work when calling users on non-RTT enabled devices or networks.
3. Call quality: RTT can sometimes affect call quality due to the simultaneous transmission of voice and text data.


RTT on the iPhone is a powerful feature that allows for real-time text messaging during phone calls. It offers improved accessibility, instant messaging, and multitasking capabilities. While there are some limitations to consider, RTT can significantly enhance your communication experience. So go ahead, enable RTT on your iPhone, and enjoy seamless and efficient conversations.


1. What does RTT stand for in relation to iPhones?

RTT stands for Real Time Text, which is a feature on iPhones that allows users to have real-time text conversations over phone calls.

2. How do I enable RTT on my iPhone?

To enable RTT on your iPhone, go to Settings, then select Accessibility, and finally click on RTT/TTY. Toggle the switch on to enable RTT.

3. Can I use RTT on any iPhone model?

No, RTT is only available on iPhone models that support iOS 12 or later.

4. How does RTT differ from regular phone calls?

RTT differs from regular phone calls as it allows users to type and read messages in real-time, making it accessible for individuals who have difficulty hearing or speaking.

5. Can I use RTT during a regular phone call?

Yes, RTT can be used during regular phone calls. Once enabled, you can switch to RTT mode during a call and start typing messages instead of speaking.

6. Is RTT available for both incoming and outgoing calls?

Yes, RTT is available for both incoming and outgoing calls. You can use it in either scenario to have real-time text conversations.

7. Are there any additional costs associated with using RTT?

No, there are no additional costs associated with using RTT on your iPhone. It is a built-in feature and does not require any extra fees or subscriptions.

8. Can I use RTT internationally?

Yes, RTT can be used internationally as long as you have a compatible iPhone and the other party also has a device that supports real-time text conversations.

9. Is RTT available for third-party calling apps?

RTT is currently only available for the Phone app on iPhones. Third-party calling apps may have their own text conversation features, but they may not be compatible with RTT.

10. Can I customize the appearance of RTT on my iPhone?

Yes, you can customize the appearance of RTT on your iPhone. In the RTT/TTY settings, you can adjust the text size, font style, and color scheme to suit your preferences.