Telecommunications Relay Service (TRS)

To make using Telecommunications Relay Service (TRS) as simple as possible, you can dial 711 to be automatically connected to a TRS communications assistant. It is fast, functional, and free. Dialing 711, both voice and TTY-based TRS users can initiate a call from any telephone, anywhere in the United States, without having to remember and dial a ten-digit access number.


•  Tap the “Settings” app. 

•  Tap “General” from the “Settings” menu. 

•  Tap “Accessibility” from the “General” menu. 

•  Select “TTY”. 

•  Select if you will use the built-in “Software TTY” or if you will attach an external device through “Hardware TTY.” 

•  Exit to the home screen. 

•  Select “Phone.” 

•  Select the person you want to call. 

•  When the call screen opens, tap the “TTY” button. 

•  Type the message you would like to send to begin the call.


•  Select the “Applications” tab. 

•  Select the “Settings” application. 

•  Select “Call” from the “Settings” application. 

•  Select “TTY mode” from the “Call” menu. 

•  Select the desired TTY mode (TTY Off, TTY Full, TTY HCO, TTY VCO, which are three different types of TTY I discussed in the previous section). 

•  Tap back to the main menu to make a call. You can now select whether you want to make the call normally or using the selected TTY mode.