diff --git a/core/api/current.txt b/core/api/current.txt
index c5bcc2715c598..15cf71d300407 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -41759,8 +41759,10 @@ package android.telephony {
     field public static final int DATA_DISCONNECTED = 0; // 0x0
     field public static final int DATA_DISCONNECTING = 4; // 0x4
     field public static final int DATA_ENABLED_REASON_CARRIER = 2; // 0x2
+    field public static final int DATA_ENABLED_REASON_OVERRIDE = 4; // 0x4
     field public static final int DATA_ENABLED_REASON_POLICY = 1; // 0x1
     field public static final int DATA_ENABLED_REASON_THERMAL = 3; // 0x3
+    field public static final int DATA_ENABLED_REASON_UNKNOWN = -1; // 0xffffffff
     field public static final int DATA_ENABLED_REASON_USER = 0; // 0x0
     field public static final int DATA_HANDOVER_IN_PROGRESS = 5; // 0x5
     field public static final int DATA_SUSPENDED = 3; // 0x3
diff --git a/core/java/android/telephony/TelephonyCallback.java b/core/java/android/telephony/TelephonyCallback.java
index baa9e6b184e9e..e8960b8e35cd4 100644
--- a/core/java/android/telephony/TelephonyCallback.java
+++ b/core/java/android/telephony/TelephonyCallback.java
@@ -1409,10 +1409,11 @@ public class TelephonyCallback {
          *
          * @param enabled {@code true} if data is enabled, otherwise disabled.
          * @param reason  Reason for data enabled/disabled.
-         *                See {@link TelephonyManager.DataEnabledReason}.
+         *                See {@link TelephonyManager.DataEnabledChangedReason}.
          */
         @RequiresPermission(Manifest.permission.READ_PRECISE_PHONE_STATE)
-        void onDataEnabledChanged(boolean enabled, @TelephonyManager.DataEnabledReason int reason);
+        void onDataEnabledChanged(boolean enabled,
+                @TelephonyManager.DataEnabledChangedReason int reason);
     }
 
     /**
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 6705ca8f99a42..63ff2324d385a 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -12542,6 +12542,25 @@ public class TelephonyManager {
     @Retention(RetentionPolicy.SOURCE)
     public @interface DataEnabledReason{}
 
+    /** @hide */
+    @IntDef({
+            DATA_ENABLED_REASON_UNKNOWN,
+            DATA_ENABLED_REASON_USER,
+            DATA_ENABLED_REASON_POLICY,
+            DATA_ENABLED_REASON_CARRIER,
+            DATA_ENABLED_REASON_THERMAL,
+            DATA_ENABLED_REASON_OVERRIDE
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface DataEnabledChangedReason{}
+
+    /**
+     * To indicate that data was enabled or disabled due to an unknown reason.
+     * Note that this is not a valid reason for {@link #setDataEnabledForReason(int, boolean)} and
+     * is only used to indicate that data enabled was changed.
+     */
+    public static final int DATA_ENABLED_REASON_UNKNOWN = -1;
+
     /**
      * To indicate that user enabled or disabled data.
      */
@@ -12568,6 +12587,13 @@ public class TelephonyManager {
      */
     public static final int DATA_ENABLED_REASON_THERMAL = 3;
 
+    /**
+     * To indicate data was enabled or disabled due to {@link MobileDataPolicy} overrides.
+     * Note that this is not a valid reason for {@link #setDataEnabledForReason(int, boolean)} and
+     * is only used to indicate that data enabled was changed due to an override.
+     */
+    public static final int DATA_ENABLED_REASON_OVERRIDE = 4;
+
     /**
      * Control of data connection and provide the reason triggering the data connection control.
      * This can be called for following reasons