What does rtt mean on my phone

Real-time text (RTT) lets you use text to communicate during a phone call. RTT works with TTY and doesn’t require any additional accessories. Note: The information in this article might not apply to all devices. … RTT uses call minutes, just like a voice call.

Settings>General>Accessibility>RTT/TTY and turn off.

Real-time text (RTT) is text transmitted instantly as it is typed or created. Recipients can immediately read the message while it is being written, without waiting. When. RTT. is enabled on both devices, no audio is heard on the call.

If you have hearing or speech difficulties, you can communicate by telephone using Teletype (TTY) or real-time text (RTT)—protocols that transmit text as you type and allow the recipient to read the message right away. … iPhone provides built-in Software RTT and TTY from the Phone app—it requires no additional devices.

When you enable TTY mode, other phone functions may not work correctly. Depending on the phone you have, you may not be able to use SMS or regular voice calls when it’s enabled. So, if you don’t use a teletypewriter, it makes sense to keep the setting switched off to have access to your phone’s full functionality.

While TTY requires users to send messages in turn, each RTT text character is transmitted in real time, enabling “a conversational flow of communication” simultaneously with voice. RTT works on both Android and iOS smartphones with updated operating systems and doesn’t require specialized equipment.