We can use the parent controls to disable the RTT feature on Android mobiles.The first thing we need to do is disable SMS messaging for the device. To do this, go to “Manage Devices” section and in the “Messaging” tab, click on “Disable SMS Messaging” option. Now to turn off the RTT, open the settings and navigate to the General settings. Tap on the “Accessibility” and move to the “Hearing” section. In this section, we can see all the features of RTT, depending on your requirements you can change the settings of the RTT calling. To completely turn off the RTT, switch off the toggle button and choose the manual option for RTT outgoing calls. This feature is exclusively for people with disabilities and in some cases of emergency, so turning it off won’t make a huge difference.