Real-time text(RTT) call option | AT&T Community Forums
Sep 18, 2020 · In Settings - Accessibility - Real-time text (RTT) call options there is only two options: "Visible during calls" & "Always visible". In the manual, it states the ability to turn off the feature, but in the phone no such feature exists. The RTT is playing havoc with attempting calls, some go through, some don't.
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