diff --git a/src/com/android/phone/CallFeaturesSetting.java b/src/com/android/phone/CallFeaturesSetting.java
index 11f81ff..10ea8ce 100644
--- a/src/com/android/phone/CallFeaturesSetting.java
+++ b/src/com/android/phone/CallFeaturesSetting.java
@@ -274,8 +274,8 @@
         }
 
         if (ImsManager.isVolteEnabledByPlatform(this) &&
-                !mPhone.getContext().getResources().getBoolean(
-                        com.android.internal.R.bool.config_carrier_volte_tty_supported)) {
+                !carrierConfig.getBoolean(
+                        CarrierConfigManager.KEY_CARRIER_VOLTE_TTY_SUPPORTED_BOOL)) {
             TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
             /* tm.listen(mPhoneStateListener, PhoneStateListener.LISTEN_CALL_STATE); */
         }
diff --git a/src/com/android/phone/settings/AccessibilitySettingsFragment.java b/src/com/android/phone/settings/AccessibilitySettingsFragment.java
index fdb0cd5..d5a613b 100644
--- a/src/com/android/phone/settings/AccessibilitySettingsFragment.java
+++ b/src/com/android/phone/settings/AccessibilitySettingsFragment.java
@@ -25,6 +25,7 @@
 import android.preference.PreferenceScreen;
 import android.provider.Settings;
 import android.telecom.TelecomManager;
+import android.telephony.CarrierConfigManager;
 import android.telephony.PhoneStateListener;
 import android.telephony.TelephonyManager;
 import android.util.Log;
@@ -98,9 +99,7 @@
     public void onResume() {
         super.onResume();
 
-        if (ImsManager.isVolteEnabledByPlatform(mContext) &&
-                !mContext.getResources().getBoolean(
-                        com.android.internal.R.bool.config_carrier_volte_tty_supported)) {
+        if (ImsManager.isVolteEnabledByPlatform(mContext) && !getVolteTtySupported()) {
             TelephonyManager tm =
                     (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
             tm.listen(mPhoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
@@ -111,9 +110,7 @@
     public void onPause() {
         super.onPause();
 
-        if (ImsManager.isVolteEnabledByPlatform(mContext) &&
-                !mContext.getResources().getBoolean(
-                        com.android.internal.R.bool.config_carrier_volte_tty_supported)) {
+        if (ImsManager.isVolteEnabledByPlatform(mContext) && !getVolteTtySupported()) {
             TelephonyManager tm =
                     (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
             tm.listen(mPhoneStateListener, PhoneStateListener.LISTEN_NONE);
@@ -138,4 +135,11 @@
         }
         return false;
     }
+
+    private boolean getVolteTtySupported() {
+        CarrierConfigManager configManager =
+                (CarrierConfigManager) mContext.getSystemService(Context.CARRIER_CONFIG_SERVICE);
+        return configManager.getConfig().getBoolean(
+                CarrierConfigManager.KEY_CARRIER_VOLTE_TTY_SUPPORTED_BOOL);
+    }
 }