how to enable TTY
How can I enable TTY on iPhone 6s iOS 12.01??
I've looked in accessibility but there's nothing relating to TTY
iPhone 6s
Question marked as
If you have the iPhone TTY Adapter, available at www.apple.com/store, you can use iPhone with a TTY machine. If you see in the status bar, it means that TTY is on. Choose Settings > General > Accessibility > TTY to turn TTY on or off.
About the TTY symbol in the status bar on your iPhone - Apple Support
and/or
Answer or make TTY calls from your iPhone - Apple Support
Since it depends on countries / carriers, ask your carrier if they have that feature available.
Regards
Giulio