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If you have a hearing or speech 
problem, you may have been wondering how to disable RTT on your iPhone. While this feature is backwards compatible with TTY, it is not available in all regions. However, you can still turn off RTT on your iPhone to make ordinary calls. Follow these steps to disable RTT on your iPhone and enjoy the normal call quality. However, make sure to check the app’s help center for further information.
Related: How to Disable Call Forwarding on iPhone
Real-time text is a feature that allows you to text someone in real-time
With Real-time Text, you can type a message and send it to someone in real-time on your iPhone. The characters you type will appear immediately, and you can chat with that person in the same way you would on a telephone. You can even read a message as you type it, which is great if you want to communicate with your loved ones without being interrupted. Real-time text is compatible with iPhones from the 6s and up, as well as older versions of ICQ messaging software.
While there are many benefits of Real-time Text, it’s important to note that it’s not available on all devices. It’s not available on all networks, and is not available in all locations. Some wireless carriers do not offer it, but there are a few places you can set up a relay number. These services are particularly useful for people with hearing impairments.
Real-time text works on any wireless device and lets you send a text message without hitting the send button. The recipient can then read the message as you type it, and if there’s an issue with the recipient’s phone, real-time text may be the only way to communicate. Real-time text is particularly useful for deaf or hard-of-hearing individuals, who may find it difficult to understand a phone call.
It is backward compatible with TTY
Many phones support TTY, but not all of them are backward compatible. For example, the Samsung Galaxy S4 has a limited TTY functionality, but the iPhone does support the technology. Android phones, on the other hand, may not support it. And some service packages do not offer RTT. Listed below are some of the phones that do support it. But you should check with your carrier to make sure.
First, open the Settings app on the iPhone. Go to General and then tap Accessibility. Scroll down to the RTT/TTY option and turn it on. Other options can be tweaked as needed. Set the Relay Number to the default, which is 711 for the US. You can also turn on Send Immediately, which shows characters as you type them. Or turn off Send Immediately, so that you have to type the entire message before sending it. Finally, turn on Answer All Calls as RTT/TTY.
For people with speech and hearing disabilities, there is an app that is designed to make calling easier. Known as “RTT,” TTY allows people with hearing or speech disabilities to communicate using a telephone using a teletype. Using this app, a teletypewriter connects to the iPhone’s headset connector, and the phone sends text and audio messages to the other party. This app supports both Hardware and Software TTY, and can be downloaded from the App Store.
