My RTT/TTY is OFF but it still interrupts my calls
My RTT/TTY is OFF but it still interrupts my calls. I have checked in Settings>General> Availability and it IS off. It is usually from one specific person. We have to call each other back a few times to get it to stop as the other person cannot hear me. After a few call backs it will turn off or stop going to RTT. Help.
iPhone X, iOS 11.3, null