diff --git a/api/current.txt b/api/current.txt
index e31f8a05611d9..b9e00f6fc0be2 100755
--- a/api/current.txt
+++ b/api/current.txt
@@ -42654,6 +42654,7 @@ package android.telephony {
     method public static int[] getSubscriptionIds(int);
     method public java.util.List<android.telephony.SubscriptionPlan> getSubscriptionPlans(int);
     method public boolean isNetworkRoaming(int);
+    method public static boolean isValidSubscriptionId(int);
     method public void removeOnOpportunisticSubscriptionsChangedListener(android.telephony.SubscriptionManager.OnOpportunisticSubscriptionsChangedListener);
     method public void removeOnSubscriptionsChangedListener(android.telephony.SubscriptionManager.OnSubscriptionsChangedListener);
     method public void setSubscriptionOverrideCongested(int, boolean, long);
diff --git a/telephony/java/android/telephony/SubscriptionManager.java b/telephony/java/android/telephony/SubscriptionManager.java
index 1d9e6052a31c6..8ebfec47c4eaf 100644
--- a/telephony/java/android/telephony/SubscriptionManager.java
+++ b/telephony/java/android/telephony/SubscriptionManager.java
@@ -1589,12 +1589,14 @@ public class SubscriptionManager {
     }
 
     /**
-     * @return true if a valid subId else false
-     * @hide
+     * Checks if the supplied subscription ID is valid.
+     * Note: a valid subscription ID does not necessarily correspond to an active subscription.
+     *
+     * @param subscriptionId The subscription ID.
+     * @return true if the supplied subscriptionId is valid; false otherwise.
      */
-    @UnsupportedAppUsage
-    public static boolean isValidSubscriptionId(int subId) {
-        return subId > INVALID_SUBSCRIPTION_ID ;
+    public static boolean isValidSubscriptionId(int subscriptionId) {
+        return subscriptionId > INVALID_SUBSCRIPTION_ID;
     }
 
     /**