diff --git a/core/api/system-current.txt b/core/api/system-current.txt
index 03c8f8fc68910..a640ffdb1736c 100644
--- a/core/api/system-current.txt
+++ b/core/api/system-current.txt
@@ -13624,6 +13624,7 @@ package android.telephony {
     field public static final int INVALID_EMERGENCY_NUMBER_DB_VERSION = -1; // 0xffffffff
     field public static final int KEY_TYPE_EPDG = 1; // 0x1
     field public static final int KEY_TYPE_WLAN = 2; // 0x2
+    field public static final int MOBILE_DATA_POLICY_AUTO_DATA_SWITCH = 3; // 0x3
     field public static final int MOBILE_DATA_POLICY_DATA_ON_NON_DEFAULT_DURING_VOICE_CALL = 1; // 0x1
     field public static final int MOBILE_DATA_POLICY_MMS_ALWAYS_ALLOWED = 2; // 0x2
     field public static final int NR_DUAL_CONNECTIVITY_DISABLE = 2; // 0x2
diff --git a/core/res/res/values/strings.xml b/core/res/res/values/strings.xml
index 73c201c5bf9d7..8764906c66cf0 100644
--- a/core/res/res/values/strings.xml
+++ b/core/res/res/values/strings.xml
@@ -202,6 +202,11 @@
     <!-- Displayed to tell the user that they cannot change the caller ID setting. -->
     <string name="CLIRPermanent">You can\'t change the caller ID setting.</string>
 
+    <!-- Notification title to tell the user that auto data switch has occurred. [CHAR LIMIT=NOTIF_TITLE] -->
+    <string name="auto_data_switch_title">Switched data to <xliff:g id="carrierDisplay" example="Verizon">%s</xliff:g></string>
+    <!-- Notification content to tell the user that auto data switch can be disabled at settings. [CHAR LIMIT=NOTIF_BODY] -->
+    <string name="auto_data_switch_content">You can change this anytime in Settings</string>
+
     <!-- Notification title to tell the user that data service is blocked by access control. [CHAR LIMIT=NOTIF_TITLE] -->
     <string name="RestrictedOnDataTitle">No mobile data service</string>
     <!-- Notification title to tell the user that emergency calling is blocked by access control. [CHAR LIMIT=NOTIF_TITLE] -->
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index fa1150cb36745..8477afa0f7fa9 100644
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -598,6 +598,8 @@
   <java-symbol type="string" name="RestrictedOnEmergencyTitle" />
   <java-symbol type="string" name="RestrictedOnNormalTitle" />
   <java-symbol type="string" name="RestrictedStateContent" />
+  <java-symbol type="string" name="auto_data_switch_title" />
+  <java-symbol type="string" name="auto_data_switch_content" />
   <java-symbol type="string" name="RestrictedStateContentMsimTemplate" />
   <java-symbol type="string" name="notification_channel_network_alert" />
   <java-symbol type="string" name="notification_channel_call_forward" />
diff --git a/telephony/common/com/android/internal/telephony/util/TelephonyUtils.java b/telephony/common/com/android/internal/telephony/util/TelephonyUtils.java
index 5179babbd31d7..76d2b7d8fce59 100644
--- a/telephony/common/com/android/internal/telephony/util/TelephonyUtils.java
+++ b/telephony/common/com/android/internal/telephony/util/TelephonyUtils.java
@@ -206,6 +206,8 @@ public final class TelephonyUtils {
                 return "DATA_ON_NON_DEFAULT_DURING_VOICE_CALL";
             case TelephonyManager.MOBILE_DATA_POLICY_MMS_ALWAYS_ALLOWED:
                 return "MMS_ALWAYS_ALLOWED";
+            case TelephonyManager.MOBILE_DATA_POLICY_AUTO_DATA_SWITCH:
+                return "AUTO_DATA_SWITCH";
             default:
                 return "UNKNOWN(" + mobileDataPolicy + ")";
         }
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 3b376fb4c6055..1654848e3f3c9 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -15400,12 +15400,30 @@ public class TelephonyManager {
     @SystemApi
     public static final int MOBILE_DATA_POLICY_MMS_ALWAYS_ALLOWED = 2;
 
+    /**
+     * Allow switching mobile data to the non-default SIM if the non-default SIM has better
+     * availability.
+     *
+     * This is used for temporarily allowing data on the non-default data SIM when on-default SIM
+     * has better availability on DSDS devices, where better availability means strong
+     * signal/connectivity.
+     * If this policy is enabled, data will be temporarily enabled on the non-default data SIM,
+     * including during any voice calls(equivalent to enabling
+     * {@link #MOBILE_DATA_POLICY_DATA_ON_NON_DEFAULT_DURING_VOICE_CALL}).
+     *
+     * This policy can be enabled and disabled via {@link #setMobileDataPolicyEnabled}.
+     * @hide
+     */
+    @SystemApi
+    public static final int MOBILE_DATA_POLICY_AUTO_DATA_SWITCH = 3;
+
     /**
      * @hide
      */
     @IntDef(prefix = { "MOBILE_DATA_POLICY_" }, value = {
             MOBILE_DATA_POLICY_DATA_ON_NON_DEFAULT_DURING_VOICE_CALL,
             MOBILE_DATA_POLICY_MMS_ALWAYS_ALLOWED,
+            MOBILE_DATA_POLICY_AUTO_DATA_SWITCH,
     })
     @Retention(RetentionPolicy.SOURCE)
     public @interface MobileDataPolicy { }