Continue the conversation, wherever you are. Real-Time Text (RTT) helps customers with disabilities communicate over the wireless network as an alternative to TTY (TeleTYpewriter). RTT uses a free-flowing mix of text and voice conversation, so as quickly as characters are typed on the sending device, they are displayed on the receiving device. RTT is a separate service from traditional text messaging (SMS). –Great for everyday communication –Supports 711 and 911 calls –Eliminates the need to connect to mobile TTY devices –Works on the cellular network and over Wi-Fi Calling –Offers a more natural, conversational flow compared to TTY and relay service for persons who are deaf, hard-of-hearing, or have speech disabilities –Supports simultaneous text and speech on RTT-to-RTT calls –Automatically imports contacts from your phone –Works on iPhone with iOS 9.0 and up; Data and voice rates may apply for app download & usage.