diff --git a/core/api/current.txt b/core/api/current.txt
index da7a7e8483432..349ec9d70235e 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -41860,6 +41860,7 @@ package android.telephony {
     field public static final String KEY_VOICE_PRIVACY_DISABLE_UI_BOOL = "voice_privacy_disable_ui_bool";
     field public static final String KEY_VOLTE_REPLACEMENT_RAT_INT = "volte_replacement_rat_int";
     field public static final String KEY_VONR_ENABLED_BOOL = "vonr_enabled_bool";
+    field public static final String KEY_VONR_ON_BY_DEFAULT_BOOL = "vonr_on_by_default_bool";
     field public static final String KEY_VONR_SETTING_VISIBILITY_BOOL = "vonr_setting_visibility_bool";
     field public static final String KEY_VT_UPGRADE_SUPPORTED_FOR_DOWNGRADED_RTT_CALL_BOOL = "vt_upgrade_supported_for_downgraded_rtt_call";
     field public static final String KEY_VVM_CELLULAR_DATA_REQUIRED_BOOL = "vvm_cellular_data_required_bool";
diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index 453c656ed9bbf..99361a0f6c436 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -8692,6 +8692,15 @@ public class CarrierConfigManager {
      */
     public static final String KEY_VONR_ENABLED_BOOL = "vonr_enabled_bool";
 
+    /**
+     * Boolean indicating the default VoNR user preference setting.
+     * If true, the VoNR setting will be enabled. If false, it will be disabled initially.
+     *
+     * Enabled by default.
+     *
+     */
+    public static final String KEY_VONR_ON_BY_DEFAULT_BOOL = "vonr_on_by_default_bool";
+
     /**
      * Determine whether unthrottle data retry when tracking area code (TAC/LAC) from cell changes
      *
@@ -9515,6 +9524,7 @@ public class CarrierConfigManager {
         sDefaults.putBoolean(KEY_UNTHROTTLE_DATA_RETRY_WHEN_TAC_CHANGES_BOOL, false);
         sDefaults.putBoolean(KEY_VONR_SETTING_VISIBILITY_BOOL, true);
         sDefaults.putBoolean(KEY_VONR_ENABLED_BOOL, false);
+        sDefaults.putBoolean(KEY_VONR_ON_BY_DEFAULT_BOOL, true);
         sDefaults.putIntArray(KEY_SUPPORTED_PREMIUM_CAPABILITIES_INT_ARRAY, new int[] {});
         sDefaults.putLong(KEY_PREMIUM_CAPABILITY_NOTIFICATION_DISPLAY_TIMEOUT_MILLIS_LONG,
                 TimeUnit.MINUTES.toMillis(30));