What Is Real-Time Text (RTT) Calls?
Real-time text (RTT) is a paid telecommunications feature for deaf or hearing-impaired users on smartphones. RTT enables users to type and read text during a phone conversation, in real time without having to click send. It avoids the delays of traditional text messaging. RTT replaces traditional TTY devices.
How Does an RTT Call Work?
RTT calls are an accessibility feature in smartphones:
To place RTT calls, turn the feature on in settings
Incoming RTT calls are automatically received in the United States
RTT calls include an audio stream that can be muted
RTT can be used to contact 911 when speaking is not possible
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