What is an RTT call? How the text accessibility feature lets you send real-time text messages

RTT stands for Real-time Text, a call feature that assists deaf, heard of hearing, and other phone users with communication during voice calls.
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RTT, or real-time text, sends text messages immediately as you type them, without requiring you to hit send.
For RTT to work, you need a wireless handset like an iPhone or Android phone using IP-based technology on networks that support RTT.For device users who are deaf, deaf-blind, or have speech-related disabilities, RTT can eliminate the