diff --git a/api/current.txt b/api/current.txt
index 4953e4aac66b2..8b06719dfad57 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -44161,6 +44161,7 @@ package android.telephony {
     field public static final String KEY_OPPORTUNISTIC_NETWORK_EXIT_THRESHOLD_RSRP_INT = "opportunistic_network_exit_threshold_rsrp_int";
     field public static final String KEY_OPPORTUNISTIC_NETWORK_EXIT_THRESHOLD_RSSNR_INT = "opportunistic_network_exit_threshold_rssnr_int";
     field public static final String KEY_PREFER_2G_BOOL = "prefer_2g_bool";
+    field public static final String KEY_PREVENT_CLIR_ACTIVATION_AND_DEACTIVATION_CODE_BOOL = "prevent_clir_activation_and_deactivation_code_bool";
     field public static final String KEY_RADIO_RESTART_FAILURE_CAUSES_INT_ARRAY = "radio_restart_failure_causes_int_array";
     field public static final String KEY_RCS_CONFIG_SERVER_URL_STRING = "rcs_config_server_url_string";
     field public static final String KEY_REQUIRE_ENTITLEMENT_CHECKS_BOOL = "require_entitlement_checks_bool";
diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index fc0c2e84243e9..f8520c9fc1808 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -3170,6 +3170,14 @@ public class CarrierConfigManager {
     public static final String KEY_DISCONNECT_CAUSE_PLAY_BUSYTONE_INT_ARRAY =
             "disconnect_cause_play_busytone_int_array";
 
+    /**
+     * Flag specifying whether to prevent sending CLIR activation("*31#") and deactivation("#31#")
+     * code only without dialing number.
+     * When {@code true}, these are prevented, {@code false} otherwise.
+     */
+    public static final String KEY_PREVENT_CLIR_ACTIVATION_AND_DEACTIVATION_CODE_BOOL =
+            "prevent_clir_activation_and_deactivation_code_bool";
+
     /** The default value for every variable. */
     private final static PersistableBundle sDefaults;
 
@@ -3596,6 +3604,7 @@ public class CarrierConfigManager {
         sDefaults.putStringArray(KEY_CARRIER_CERTIFICATE_STRING_ARRAY, null);
         sDefaults.putIntArray(KEY_DISCONNECT_CAUSE_PLAY_BUSYTONE_INT_ARRAY,
                 new int[] {4 /* BUSY */});
+        sDefaults.putBoolean(KEY_PREVENT_CLIR_ACTIVATION_AND_DEACTIVATION_CODE_BOOL, false);
     }
 
     /**