What is RTT calling and how does it work?

[Bschomluecia]

I recently heard about RTT calling but I’m not sure what it actually does. I understand it’s related to real-time text during calls. Can someone explain how it works and when it’s useful?

 

[royjasika]

RTT (Real-Time Text) calling lets users send text instantly during a phone call, with each letter appearing as it’s typed. It’s designed for people who are deaf or have speech difficulties. On devices like iPhone or Android, RTT works over cellular or Wi-Fi, allowing seamless communication without voice. Both parties must enable RTT, and it often integrates with accessibility settings for easier use.