diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index d4bec42dbc019..7c228748414f3 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -3842,10 +3842,12 @@ public class TelephonyManager {
     }
 
     /**
-     * Return the set of subscriber IDs that should be considered as "merged
-     * together" for data usage purposes. This is commonly {@code null} to
-     * indicate no merging is required. Any returned subscribers are sorted in a
-     * deterministic order.
+     * Return the set of subscriber IDs that should be considered "merged together" for data usage
+     * purposes. This is commonly {@code null} to indicate no merging is required. Any returned
+     * subscribers are sorted in a deterministic order.
+     * <p>
+     * The returned set of subscriber IDs will include the subscriber ID corresponding to this
+     * TelephonyManager's subId.
      *
      * @hide
      */
@@ -3854,7 +3856,7 @@ public class TelephonyManager {
         try {
             ITelephony telephony = getITelephony();
             if (telephony != null)
-                return telephony.getMergedSubscriberIds(getOpPackageName());
+                return telephony.getMergedSubscriberIds(getSubId(), getOpPackageName());
         } catch (RemoteException ex) {
         } catch (NullPointerException ex) {
         }
diff --git a/telephony/java/com/android/internal/telephony/ITelephony.aidl b/telephony/java/com/android/internal/telephony/ITelephony.aidl
index f226bb1fa5887..3991fea66a855 100644
--- a/telephony/java/com/android/internal/telephony/ITelephony.aidl
+++ b/telephony/java/com/android/internal/telephony/ITelephony.aidl
@@ -1051,7 +1051,17 @@ interface ITelephony {
      */
     String getLine1AlphaTagForDisplay(int subId, String callingPackage);
 
-    String[] getMergedSubscriberIds(String callingPackage);
+    /**
+     * Return the set of subscriber IDs that should be considered "merged together" for data usage
+     * purposes. This is commonly {@code null} to indicate no merging is required. Any returned
+     * subscribers are sorted in a deterministic order.
+     * <p>
+     * The returned set of subscriber IDs will include the subscriber ID corresponding to this
+     * TelephonyManager's subId.
+     *
+     * @hide
+     */
+    String[] getMergedSubscriberIds(int subId, String callingPackage);
 
     /**
      * Override the operator branding for the current ICCID.