diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index 94a755c..ee69dad 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -2437,6 +2437,32 @@
     public static final String KEY_CDMA_ENHANCED_ROAMING_INDICATOR_FOR_HOME_NETWORK_INT_ARRAY =
             "cdma_enhanced_roaming_indicator_for_home_network_int_array";
 
+    /**
+     * This configuration allow the system UI to display different 5G icon for different 5G status.
+     *
+     * There are four 5G status:
+     * 1. connected_mmwave: device currently connected to 5G cell as the secondary cell and using
+     *    millimeter wave.
+     * 2. connected: device currently connected to 5G cell as the secondary cell but not using
+     *    millimeter wave.
+     * 3. not_restricted: device camped on a network that has 5G capability(not necessary to connect
+     *    a 5G cell as a secondary cell) and the use of 5G is not restricted.
+     * 4. restricted: device camped on a network that has 5G capability(not necessary to connect a
+     *    5G cell as a secondary cell) but the use of 5G is restricted.
+     *
+     * The configured string contains multiple key-value pairs separated by comma. For each pair,
+     * the key and value is separated by a colon. The key is corresponded to a 5G status above and
+     * the value is the icon name. Use "None" as the icon name if no icon should be shown in a
+     * specific 5G status.
+     *
+     * Here is an example of the configuration:
+     * "connected_mmwave:5GPlus,connected:5G,not_restricted:None,restricted:None"
+     *
+     * @hide
+     */
+    public static final String KEY_5G_ICON_CONFIGURATION_STRING =
+            "5g_icon_configuration_string";
+
     /** The default value for every variable. */
     private final static PersistableBundle sDefaults;
 
@@ -2817,6 +2843,8 @@
                 new int[] {
                         1 /* Roaming Indicator Off */
                 });
+        sDefaults.putString(KEY_5G_ICON_CONFIGURATION_STRING,
+                "connected_mmwave:None,connected:5G,not_restricted:None,restricted:None");
     }
 
     /**