diff --git a/api/system-current.txt b/api/system-current.txt
index 189611d2040ba..1ddbf36efe45a 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -5458,6 +5458,7 @@ package android.telephony {
     method public deprecated boolean getDataEnabled(int);
     method public boolean getEmergencyCallbackMode();
     method public java.lang.String getIsimDomain();
+    method public java.lang.String getIsimIst();
     method public int getPreferredNetworkType(int);
     method public int getRadioPowerState();
     method public int getSimApplicationState();
@@ -6015,6 +6016,7 @@ package android.telephony.ims {
   public class ImsMmTelManager {
     method public static android.telephony.ims.ImsMmTelManager createForSubscriptionId(android.content.Context, int);
     method public int getVoWiFiModeSetting();
+    method public int getVoWiFiRoamingModeSetting();
     method public boolean isAdvancedCallingSettingEnabled();
     method public boolean isAvailable(int, int);
     method public boolean isCapable(int, int);
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 739c80fd9d976..37a04c5df6f39 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -5822,9 +5822,14 @@ public class TelephonyManager {
 
     /**
      * Returns the IMS Service Table (IST) that was loaded from the ISIM.
+     *
+     * See 3GPP TS 31.103 (Section 4.2.7) for the definition and more information on this table.
+     *
      * @return IMS Service Table or null if not present or not loaded
      * @hide
      */
+    @SystemApi
+    @RequiresPermission(Manifest.permission.READ_PRIVILEGED_PHONE_STATE)
     public String getIsimIst() {
         try {
             IPhoneSubInfo info = getSubscriberInfo();
diff --git a/telephony/java/android/telephony/ims/ImsMmTelManager.java b/telephony/java/android/telephony/ims/ImsMmTelManager.java
index 122626f0c77ae..e2350fe78500b 100644
--- a/telephony/java/android/telephony/ims/ImsMmTelManager.java
+++ b/telephony/java/android/telephony/ims/ImsMmTelManager.java
@@ -714,7 +714,7 @@ public class ImsMmTelManager {
      * @see #setVoWiFiRoamingSetting(boolean)
      */
     @RequiresPermission(Manifest.permission.READ_PRIVILEGED_PHONE_STATE)
-    @WiFiCallingMode int getVoWiFiRoamingModeSetting() {
+    public @WiFiCallingMode int getVoWiFiRoamingModeSetting() {
         try {
             return getITelephony().getVoWiFiRoamingModeSetting(mSubId);
         } catch (RemoteException e) {