Session Status

Due to inactivity, your session will end in approximately 2 minutes. Extend your session by clicking OK below.

Due to inactivity, your session has expired. Please sign in again to continue.

Samsung Galaxy S21 5G / Galaxy S21 Ultra 5G - Manage RTT Settings

2026-10-23 22:01:04.158

Samsung Galaxy S21 5G / Galaxy S21 Ultra 5G - Manage RTT Settings

Here's how to use the real-time text (RTT) feature on your Galaxy S21 5G / Galaxy S21+ 5G / Galaxy S21 Ultra 5G.
Real-time text (RTT) is text transmitted instantly as it is typed or created. Recipients can immediately read the message while it is being written without waiting or the need for an additional device.

Change RTT Visibility

  1. From a Home screen, swipe up from the center of the display to access the apps screen.
    These instructions only apply to Standard mode and the default Home screen layout.
  2. Navigate:
    Settings Settings icon
    Accessibility
    Hearing enhancements
    .
  3. Tap
    Real Time Text
    .
  4. Tap
    RTT call button
    .
  5. Select the preferred setting:
    • Visible during calls
      : Show the RTT call button only during RTT calls.
    • Always visible
      : Show the RTT call button on the keypad and during all calls.

Make a Call with RTT

  1. From a Home screen, tap the
    Phone icon
     Phone icon.
    If unavailable, swipe up from the center of the display then tap
    Phone
    .
  2. Do one of the following:
    The RTT call icon displays when RTT is set to 'Always visible'.
    • From the Keypad tab (lower-left), enter a 10-digit number then tap the
      RTT call icon
       (at the bottom).
    • From the Contacts tab (lower-right), select a contact then tap the
      RTT call icon
      .

Switch a Call to RTT

  1. While on a call, tap
    Real Time Text
    .
    The Real Time Text option displays when RTT is set to 'Always visible'.
    Real Time Text

End an RTT Call

  1. While on a call, tap
    End
    .
    RTT end call