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What is RTT calling on Android?

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  • 3 min read

Smartphones are bridges for smooth conversations, offering many features beyond regular voice calls. Real-time text (RTT) calling on Android is one such innovation that has made communication easier. RTT calling is a feature that changed how individuals with hearing or speech impairments communicate by providing real-time text-based conversations.

In this article, we have discussed what RTT is calling, how it works and how to enable it on an Android phone.

Also read: How to do a conference call on Android?

What is RTT calling?

RTT stands for Real-Time Text, and when you have an RTT call, it means you’re using text to talk in real time. This means the words you type immediately show up, like in a conversation, without pressing a send button. An RTT call makes texting more like talking on the phone, where the messages are quick and smooth, unlike regular text messages, which can sometimes be slow.

Through the FCC, the US government made a rule that phone makers have to create phones that can do RTT calls. They also changed from older Text Telephony (TTY) technology to RTT, which is now finished. This means you no longer need special TTY devices – you can use RTT on modern phones instead.

How does RTT calling work?

RTT calling is an accessibility feature, so you must turn it on in your phone’s settings to make an RTT call. However, when someone else makes an RTT call to you, it will come through automatically without needing to turn on the feature.

When you’re in an RTT call, it’s a bit like using an instant messaging app, but even quicker. Both people can type messages and instantly appear on the other person’s screen. It’s a good idea to wait for the other person to finish typing before you start, just like in a regular conversation. You can also have sound during RTT calls, but you can mute or unmute your microphone if you need to.

Also read: How to make the keyboard bigger on Android?

How to enable RTT calling?

  • Open the Phone app.
  • Click on the Menu (triple vertical dots) button in the top right corner of the screen.
  • In the dropdown menu, tap on  Settings.
  • Tap on Accessibility.
  • Then tap on RTT.
  • You can choose from one of the following settings.
    • Not visible: Hides the RTT calling button but allows incoming RTT calls.
    • Visible during a call: The RTT calling button becomes visible after the outgoing call connects.
    • Always visible: The RTT calling button is always visible.

Also read: How to see blocked numbers on Android?


Akash Singh

Akash is a law graduate who likes to go for bike rides on the weekends soul-searching for answers to his many existential questions. You can contact him here: [email protected]