diff --git a/core/res/res/values-mcc310-mnc160/config.xml b/core/res/res/values-mcc310-mnc160/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc160/config.xml
+++ b/core/res/res/values-mcc310-mnc160/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc200/config.xml b/core/res/res/values-mcc310-mnc200/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc200/config.xml
+++ b/core/res/res/values-mcc310-mnc200/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc210/config.xml b/core/res/res/values-mcc310-mnc210/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc210/config.xml
+++ b/core/res/res/values-mcc310-mnc210/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc220/config.xml b/core/res/res/values-mcc310-mnc220/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc220/config.xml
+++ b/core/res/res/values-mcc310-mnc220/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc230/config.xml b/core/res/res/values-mcc310-mnc230/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc230/config.xml
+++ b/core/res/res/values-mcc310-mnc230/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc240/config.xml b/core/res/res/values-mcc310-mnc240/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc240/config.xml
+++ b/core/res/res/values-mcc310-mnc240/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc250/config.xml b/core/res/res/values-mcc310-mnc250/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc250/config.xml
+++ b/core/res/res/values-mcc310-mnc250/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc260/config.xml b/core/res/res/values-mcc310-mnc260/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc260/config.xml
+++ b/core/res/res/values-mcc310-mnc260/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc270/config.xml b/core/res/res/values-mcc310-mnc270/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc270/config.xml
+++ b/core/res/res/values-mcc310-mnc270/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc300/config.xml b/core/res/res/values-mcc310-mnc300/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc300/config.xml
+++ b/core/res/res/values-mcc310-mnc300/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc310/config.xml b/core/res/res/values-mcc310-mnc310/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc310/config.xml
+++ b/core/res/res/values-mcc310-mnc310/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc490/config.xml b/core/res/res/values-mcc310-mnc490/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc490/config.xml
+++ b/core/res/res/values-mcc310-mnc490/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc530/config.xml b/core/res/res/values-mcc310-mnc530/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc530/config.xml
+++ b/core/res/res/values-mcc310-mnc530/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc580/config.xml b/core/res/res/values-mcc310-mnc580/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc580/config.xml
+++ b/core/res/res/values-mcc310-mnc580/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc590/config.xml b/core/res/res/values-mcc310-mnc590/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc590/config.xml
+++ b/core/res/res/values-mcc310-mnc590/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc640/config.xml b/core/res/res/values-mcc310-mnc640/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc640/config.xml
+++ b/core/res/res/values-mcc310-mnc640/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc660/config.xml b/core/res/res/values-mcc310-mnc660/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc660/config.xml
+++ b/core/res/res/values-mcc310-mnc660/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values-mcc310-mnc800/config.xml b/core/res/res/values-mcc310-mnc800/config.xml
index 6bfc3d19ac64d..5a6a84bd06b39 100644
--- a/core/res/res/values-mcc310-mnc800/config.xml
+++ b/core/res/res/values-mcc310-mnc800/config.xml
@@ -29,4 +29,7 @@
          carrier provisioning. If false: hard disabled. If true: then depends on carrier
          provisioning, availability etc -->
     <bool name="config_carrier_volte_available">true</bool>
+
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">false</bool>
 </resources>
diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml
index 0376a5dc2af7c..d036140451c01 100755
--- a/core/res/res/values/config.xml
+++ b/core/res/res/values/config.xml
@@ -1874,6 +1874,9 @@
     <!-- Flag specifying whether VoLTE availability is based on provisioning -->
     <bool name="config_carrier_volte_provisioned">false</bool>
 
+    <!-- Flag specifying whether VoLTE TTY is supported -->
+    <bool name="config_carrier_volte_tty_supported">true</bool>
+
     <!-- Flag specifying whether VT is available on device -->
     <bool name="config_device_vt_available">false</bool>
 
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index 6661290928082..5fc0ce5d72e86 100755
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -2086,6 +2086,7 @@
   <java-symbol type="bool" name="config_device_volte_available" />
   <java-symbol type="bool" name="config_carrier_volte_available" />
   <java-symbol type="bool" name="config_carrier_volte_provisioned" />
+  <java-symbol type="bool" name="config_carrier_volte_tty_supported" />
   <java-symbol type="bool" name="config_device_vt_available" />
   <java-symbol type="bool" name="config_carrier_vt_available" />
   <java-symbol type="bool" name="useImsAlwaysForEmergencyCall" />