diff --git a/api/current.txt b/api/current.txt
index ff6bf6f9ed8b5..d9515919a0946 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -30538,11 +30538,13 @@ package android.telephony {
     field public static final java.lang.String KEY_ALLOW_LOCAL_DTMF_TONES_BOOL = "allow_local_dtmf_tones_bool";
     field public static final java.lang.String KEY_APN_EXPAND_BOOL = "apn_expand_bool";
     field public static final java.lang.String KEY_AUTO_RETRY_ENABLED_BOOL = "auto_retry_enabled_bool";
+    field public static final java.lang.String KEY_CARRIER_ALLOW_TURNOFF_IMS_BOOL = "carrier_allow_turnoff_ims_bool";
     field public static final java.lang.String KEY_CARRIER_SETTINGS_ENABLE_BOOL = "carrier_settings_enable_bool";
     field public static final java.lang.String KEY_CARRIER_VOLTE_AVAILABLE_BOOL = "carrier_volte_available_bool";
-    field public static final java.lang.String KEY_CARRIER_VOLTE_PROVISIONED_BOOL = "carrier_volte_provisioned_bool";
+    field public static final java.lang.String KEY_CARRIER_VOLTE_PROVISIONING_REQUIRED_BOOL = "carrier_volte_provisioning_required_bool";
     field public static final java.lang.String KEY_CARRIER_VOLTE_TTY_SUPPORTED_BOOL = "carrier_volte_tty_supported_bool";
     field public static final java.lang.String KEY_CARRIER_VVM_PACKAGE_NAME_STRING = "carrier_vvm_package_name_string";
+    field public static final java.lang.String KEY_CARRIER_VT_AVAILABLE_BOOL = "carrier_vt_available_bool";
     field public static final java.lang.String KEY_CARRIER_WFC_IMS_AVAILABLE_BOOL = "carrier_wfc_ims_available_bool";
     field public static final java.lang.String KEY_CDMA_NONROAMING_NETWORKS_STRING_ARRAY = "cdma_nonroaming_networks_string_array";
     field public static final java.lang.String KEY_CDMA_ROAMING_NETWORKS_STRING_ARRAY = "cdma_roaming_networks_string_array";
diff --git a/api/system-current.txt b/api/system-current.txt
index 818827f62b607..404f5e5303e19 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -32763,11 +32763,13 @@ package android.telephony {
     field public static final java.lang.String KEY_ALLOW_LOCAL_DTMF_TONES_BOOL = "allow_local_dtmf_tones_bool";
     field public static final java.lang.String KEY_APN_EXPAND_BOOL = "apn_expand_bool";
     field public static final java.lang.String KEY_AUTO_RETRY_ENABLED_BOOL = "auto_retry_enabled_bool";
+    field public static final java.lang.String KEY_CARRIER_ALLOW_TURNOFF_IMS_BOOL = "carrier_allow_turnoff_ims_bool";
     field public static final java.lang.String KEY_CARRIER_SETTINGS_ENABLE_BOOL = "carrier_settings_enable_bool";
     field public static final java.lang.String KEY_CARRIER_VOLTE_AVAILABLE_BOOL = "carrier_volte_available_bool";
-    field public static final java.lang.String KEY_CARRIER_VOLTE_PROVISIONED_BOOL = "carrier_volte_provisioned_bool";
+    field public static final java.lang.String KEY_CARRIER_VOLTE_PROVISIONING_REQUIRED_BOOL = "carrier_volte_provisioning_required_bool";
     field public static final java.lang.String KEY_CARRIER_VOLTE_TTY_SUPPORTED_BOOL = "carrier_volte_tty_supported_bool";
     field public static final java.lang.String KEY_CARRIER_VVM_PACKAGE_NAME_STRING = "carrier_vvm_package_name_string";
+    field public static final java.lang.String KEY_CARRIER_VT_AVAILABLE_BOOL = "carrier_vt_available_bool";
     field public static final java.lang.String KEY_CARRIER_WFC_IMS_AVAILABLE_BOOL = "carrier_wfc_ims_available_bool";
     field public static final java.lang.String KEY_CDMA_NONROAMING_NETWORKS_STRING_ARRAY = "cdma_nonroaming_networks_string_array";
     field public static final java.lang.String KEY_CDMA_ROAMING_NETWORKS_STRING_ARRAY = "cdma_roaming_networks_string_array";
diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index 5deed76523c78..960892f238fff 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -217,6 +217,12 @@ public class CarrierConfigManager {
      */
     public static final String KEY_CARRIER_VOLTE_AVAILABLE_BOOL = "carrier_volte_available_bool";
 
+    /**
+     * Flag specifying whether video telephony is available for carrier. If false: hard disabled.
+     * If true: then depends on carrier provisioning, availability, etc.
+     */
+    public static final String KEY_CARRIER_VT_AVAILABLE_BOOL = "carrier_vt_available_bool";
+
     /**
      * Flag specifying whether WFC over IMS should be available for carrier: independent of
      * carrier provisioning. If false: hard disabled. If true: then depends on carrier
@@ -224,13 +230,21 @@ public class CarrierConfigManager {
      */
     public static final String KEY_CARRIER_WFC_IMS_AVAILABLE_BOOL = "carrier_wfc_ims_available_bool";
 
-    /** Flag specifying whether VoLTE availability is based on provisioning. */
-    public static final String KEY_CARRIER_VOLTE_PROVISIONED_BOOL = "carrier_volte_provisioned_bool";
+    /** Flag specifying whether provisioning is required for VOLTE. */
+    public static final String KEY_CARRIER_VOLTE_PROVISIONING_REQUIRED_BOOL
+            = "carrier_volte_provisioning_required_bool";
 
     /** Flag specifying whether VoLTE TTY is supported. */
     public static final String KEY_CARRIER_VOLTE_TTY_SUPPORTED_BOOL
             = "carrier_volte_tty_supported_bool";
 
+    /**
+     * Flag specifying whether IMS service can be turned off. If false then the service will not be
+     * turned-off completely, but individual features can be disabled.
+     */
+    public static final String KEY_CARRIER_ALLOW_TURNOFF_IMS_BOOL
+            = "carrier_allow_turnoff_ims_bool";
+
     /**
      * If Voice Radio Technology is RIL_RADIO_TECHNOLOGY_LTE:14 or RIL_RADIO_TECHNOLOGY_UNKNOWN:0
      * this is the value that should be used instead. A configuration value of
@@ -376,9 +390,11 @@ public class CarrierConfigManager {
         sDefaults.putBoolean(KEY_AUTO_RETRY_ENABLED_BOOL, false);
         sDefaults.putBoolean(KEY_CARRIER_SETTINGS_ENABLE_BOOL, false);
         sDefaults.putBoolean(KEY_CARRIER_VOLTE_AVAILABLE_BOOL, false);
+        sDefaults.putBoolean(KEY_CARRIER_VT_AVAILABLE_BOOL, false);
         sDefaults.putBoolean(KEY_CARRIER_WFC_IMS_AVAILABLE_BOOL, false);
-        sDefaults.putBoolean(KEY_CARRIER_VOLTE_PROVISIONED_BOOL, false);
+        sDefaults.putBoolean(KEY_CARRIER_VOLTE_PROVISIONING_REQUIRED_BOOL, false);
         sDefaults.putBoolean(KEY_CARRIER_VOLTE_TTY_SUPPORTED_BOOL, true);
+        sDefaults.putBoolean(KEY_CARRIER_ALLOW_TURNOFF_IMS_BOOL, true);
         sDefaults.putBoolean(KEY_DISABLE_CDMA_ACTIVATION_CODE_BOOL, false);
         sDefaults.putBoolean(KEY_DTMF_TYPE_ENABLED_BOOL, false);
         sDefaults.putBoolean(KEY_ENABLE_DIALER_KEY_VIBRATION_BOOL, true);