diff --git a/telephony/java/android/telephony/SubscriptionInfo.java b/telephony/java/android/telephony/SubscriptionInfo.java
index 9eff809..ebb5175 100644
--- a/telephony/java/android/telephony/SubscriptionInfo.java
+++ b/telephony/java/android/telephony/SubscriptionInfo.java
@@ -89,8 +89,8 @@
     private int mCarrierId;
 
     /**
-     * The source of the name, NAME_SOURCE_DEFAULT_SOURCE, NAME_SOURCE_SIM_SOURCE or
-     * NAME_SOURCE_USER_INPUT.
+     * The source of the name, NAME_SOURCE_DEFAULT_SOURCE, NAME_SOURCE_SIM_SPN,
+     * NAME_SOURCE_SIM_PNN, or NAME_SOURCE_USER_INPUT.
      */
     private int mNameSource;
 
@@ -334,7 +334,7 @@
     }
 
     /**
-     * @return the source of the name, eg NAME_SOURCE_DEFAULT_SOURCE, NAME_SOURCE_SIM_SOURCE or
+     * @return the source of the name, eg NAME_SOURCE_DEFAULT_SOURCE, NAME_SOURCE_SIM_SPN or
      * NAME_SOURCE_USER_INPUT.
      * @hide
      */
diff --git a/telephony/java/android/telephony/SubscriptionManager.java b/telephony/java/android/telephony/SubscriptionManager.java
index fbbc951..16415ea 100644
--- a/telephony/java/android/telephony/SubscriptionManager.java
+++ b/telephony/java/android/telephony/SubscriptionManager.java
@@ -400,19 +400,19 @@
     public static final String NAME_SOURCE = "name_source";
 
     /**
-     * The name_source is the default
+     * The name_source is the default, which is from the carrier id.
      * @hide
      */
     public static final int NAME_SOURCE_DEFAULT_SOURCE = 0;
 
     /**
-     * The name_source is from the SIM
+     * The name_source is from SIM EF_SPN.
      * @hide
      */
-    public static final int NAME_SOURCE_SIM_SOURCE = 1;
+    public static final int NAME_SOURCE_SIM_SPN = 1;
 
     /**
-     * The name_source is from the user
+     * The name_source is from user input
      * @hide
      */
     @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
@@ -425,6 +425,24 @@
     public static final int NAME_SOURCE_CARRIER = 3;
 
     /**
+     * The name_source is from SIM EF_PNN.
+     * @hide
+     */
+    public static final int NAME_SOURCE_SIM_PNN = 4;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(prefix = {"NAME_SOURCE_"},
+            value = {
+                    NAME_SOURCE_DEFAULT_SOURCE,
+                    NAME_SOURCE_SIM_SPN,
+                    NAME_SOURCE_USER_INPUT,
+                    NAME_SOURCE_CARRIER,
+                    NAME_SOURCE_SIM_PNN
+            })
+    public @interface SimDisplayNameSource {}
+
+    /**
      * TelephonyProvider column name for the color of a SIM.
      * <P>Type: INTEGER (int)</P>
      */
@@ -1660,13 +1678,12 @@
      * Set display name by simInfo index with name source
      * @param displayName the display name of SIM card
      * @param subId the unique SubscriptionInfo index in database
-     * @param nameSource 0: NAME_SOURCE_DEFAULT_SOURCE, 1: NAME_SOURCE_SIM_SOURCE,
-     *                   2: NAME_SOURCE_USER_INPUT
+     * @param nameSource SIM display name source
      * @return the number of records updated or < 0 if invalid subId
      * @hide
      */
     @UnsupportedAppUsage
-    public int setDisplayName(String displayName, int subId, int nameSource) {
+    public int setDisplayName(String displayName, int subId, @SimDisplayNameSource int nameSource) {
         if (VDBG) {
             logd("[setDisplayName]+  displayName:" + displayName + " subId:" + subId
                     + " nameSource:" + nameSource);