RTT calling and TTY are accessibility features that help the deaf and hard-of-hearing community make text-based phone calls. Read on!

You may have seen the RTT feature on your iPhone and wondered what it's all about. It's an accessibility feature. Here's what it does and why people need it.

To turn off RTT on a Galaxy S10 device: Go Settings app. Tap on More Settings icon. Tap Bluetooth Settings. In here, make sure that audio is not connected to a headset.

Real-time text calling allows deaf people to hold real-time conversations, but you may not need it. How to turn RTT off on Android.