diff --git a/src/com/android/settings/network/ProviderModelSliceHelper.java b/src/com/android/settings/network/ProviderModelSliceHelper.java
index 32a475a..e0d1eb1 100644
--- a/src/com/android/settings/network/ProviderModelSliceHelper.java
+++ b/src/com/android/settings/network/ProviderModelSliceHelper.java
@@ -61,6 +61,7 @@
 
 /**
  * The helper is for slice of carrier and non-Carrier, used by ProviderModelSlice.
+ * TODO: Remove the class in U because Settings does not use slice anymore.
  */
 public class ProviderModelSliceHelper {
     private static final String TAG = "ProviderModelSlice";
@@ -140,7 +141,7 @@
             numLevels += 1;
         }
         return MobileNetworkUtils.getSignalStrengthIcon(mContext, level, numLevels,
-                NO_CELL_DATA_TYPE_ICON, false);
+                NO_CELL_DATA_TYPE_ICON, false, false);
     }
 
     /**
diff --git a/src/com/android/settings/network/SubscriptionsPreferenceController.java b/src/com/android/settings/network/SubscriptionsPreferenceController.java
index 4ce7d26..9cd49c8 100644
--- a/src/com/android/settings/network/SubscriptionsPreferenceController.java
+++ b/src/com/android/settings/network/SubscriptionsPreferenceController.java
@@ -36,10 +36,12 @@
 import android.telephony.SignalStrength;
 import android.telephony.SubscriptionInfo;
 import android.telephony.SubscriptionManager;
+import android.telephony.TelephonyCallback;
 import android.telephony.TelephonyDisplayInfo;
 import android.telephony.TelephonyManager;
 import android.text.Html;
 import android.util.ArraySet;
+import android.util.Log;
 
 import androidx.annotation.VisibleForTesting;
 import androidx.collection.ArrayMap;
@@ -78,7 +80,8 @@
 public class SubscriptionsPreferenceController extends AbstractPreferenceController implements
         LifecycleObserver, SubscriptionsChangeListener.SubscriptionsChangeListenerClient,
         MobileDataEnabledListener.Client, DataConnectivityListener.Client,
-        SignalStrengthListener.Callback, TelephonyDisplayInfoListener.Callback {
+        SignalStrengthListener.Callback, TelephonyDisplayInfoListener.Callback,
+        TelephonyCallback.CarrierNetworkListener {
     private static final String TAG = "SubscriptionsPrefCntrlr";
 
     private UpdateListener mUpdateListener;
@@ -93,6 +96,7 @@
     private TelephonyDisplayInfoListener mTelephonyDisplayInfoListener;
     private WifiPickerTrackerHelper mWifiPickerTrackerHelper;
     private final WifiManager mWifiManager;
+    private boolean mCarrierNetworkChangeMode;
 
     @VisibleForTesting
     final BroadcastReceiver mConnectionChangeReceiver = new BroadcastReceiver() {
@@ -283,8 +287,8 @@
                 ? false
                 : regInfo.isRegistered();
         final boolean isCarrierNetworkActive = isCarrierNetworkActive();
-        String result = mSubsPrefCtrlInjector.getNetworkType(
-                mContext, mConfig, mTelephonyDisplayInfo, subId, isCarrierNetworkActive);
+        String result = mSubsPrefCtrlInjector.getNetworkType(mContext, mConfig,
+                mTelephonyDisplayInfo, subId, isCarrierNetworkActive, mCarrierNetworkChangeMode);
         if (mSubsPrefCtrlInjector.isActiveCellularNetwork(mContext) || isCarrierNetworkActive) {
             if (result.isEmpty()) {
                 result = mContext.getString(isDds ? R.string.mobile_data_connection_active
@@ -335,7 +339,8 @@
                 || (!isDds(subId) && tmForSubId.isMobileDataPolicyEnabled(
                         TelephonyManager.MOBILE_DATA_POLICY_AUTO_DATA_SWITCH));
         if (isDataInService || isVoiceInService || isCarrierNetworkActive) {
-            icon = mSubsPrefCtrlInjector.getIcon(mContext, level, numLevels, !isDataEnabled);
+            icon = mSubsPrefCtrlInjector.getIcon(mContext, level, numLevels, !isDataEnabled,
+                    mCarrierNetworkChangeMode);
         }
 
         final boolean isActiveCellularNetwork =
@@ -472,6 +477,12 @@
         update();
     }
 
+    @Override
+    public void onCarrierNetworkChange(boolean active) {
+        mCarrierNetworkChangeMode = active;
+        update();
+    }
+
     public void setWifiPickerTrackerHelper(WifiPickerTrackerHelper helper) {
         mWifiPickerTrackerHelper = helper;
     }
@@ -549,44 +560,39 @@
         }
 
         /**
-         * Gets current mobile network type.
+         * Gets current network type of Carrier Wi-Fi Network or Cellular.
          */
         public String getNetworkType(Context context, Config config,
-                TelephonyDisplayInfo telephonyDisplayInfo, int subId) {
-            String iconKey = getIconKey(telephonyDisplayInfo);
-            MobileIconGroup iconGroup = mapIconSets(config).get(iconKey);
-            int resId = 0;
-            if (iconGroup != null) {
-                resId = iconGroup.dataContentDescription;
+                TelephonyDisplayInfo telephonyDisplayInfo, int subId, boolean isCarrierWifiNetwork,
+                boolean carrierNetworkChanged) {
+            MobileIconGroup iconGroup = null;
+            if (isCarrierWifiNetwork) {
+                iconGroup = TelephonyIcons.CARRIER_MERGED_WIFI;
+            } else if (carrierNetworkChanged) {
+                iconGroup = TelephonyIcons.CARRIER_NETWORK_CHANGE;
+            } else {
+                String iconKey = getIconKey(telephonyDisplayInfo);
+                iconGroup = mapIconSets(config).get(iconKey);
             }
+
+            if (iconGroup == null) {
+                Log.d(TAG, "Can not get the network's icon and description.");
+                return "";
+            }
+
+            int resId = iconGroup.dataContentDescription;
             return resId != 0
                     ? SubscriptionManager.getResourcesForSubId(context, subId).getString(resId)
                     : "";
         }
 
         /**
-         * Gets current network type of Carrier Wi-Fi Network or Cellular.
-         */
-        public String getNetworkType(Context context, Config config,
-                TelephonyDisplayInfo telephonyDisplayInfo, int subId,
-                boolean isCarrierWifiNetwork) {
-            if (isCarrierWifiNetwork) {
-                MobileIconGroup carrierMergedWifiIconGroup = TelephonyIcons.CARRIER_MERGED_WIFI;
-                int resId = carrierMergedWifiIconGroup.dataContentDescription;
-                return resId != 0
-                        ? SubscriptionManager.getResourcesForSubId(context, subId)
-                        .getString(resId) : "";
-            } else {
-                return getNetworkType(context, config, telephonyDisplayInfo, subId);
-            }
-        }
-
-        /**
          * Gets signal icon with different signal level.
          */
-        public Drawable getIcon(Context context, int level, int numLevels, boolean cutOut) {
+        public Drawable getIcon(Context context, int level, int numLevels, boolean cutOut,
+                boolean carrierNetworkChanged) {
             return MobileNetworkUtils.getSignalStrengthIcon(context, level, numLevels,
-                    NO_CELL_DATA_TYPE_ICON, cutOut);
+                    NO_CELL_DATA_TYPE_ICON, cutOut, carrierNetworkChanged);
         }
     }
 }
diff --git a/src/com/android/settings/network/telephony/MobileNetworkUtils.java b/src/com/android/settings/network/telephony/MobileNetworkUtils.java
index 599fa6b..423ba2f 100644
--- a/src/com/android/settings/network/telephony/MobileNetworkUtils.java
+++ b/src/com/android/settings/network/telephony/MobileNetworkUtils.java
@@ -613,10 +613,11 @@
     }
 
     public static Drawable getSignalStrengthIcon(Context context, int level, int numLevels,
-            int iconType, boolean cutOut) {
+            int iconType, boolean cutOut, boolean carrierNetworkChanged) {
         final SignalDrawable signalDrawable = new SignalDrawable(context);
         signalDrawable.setLevel(
-                SignalDrawable.getState(level, numLevels, cutOut));
+                carrierNetworkChanged ? SignalDrawable.getCarrierChangeState(numLevels)
+                        : SignalDrawable.getState(level, numLevels, cutOut));
 
         // Make the network type drawable
         final Drawable networkDrawable =
diff --git a/src/com/android/settings/network/telephony/NetworkOperatorPreference.java b/src/com/android/settings/network/telephony/NetworkOperatorPreference.java
index 397bf36..7404aa4 100644
--- a/src/com/android/settings/network/telephony/NetworkOperatorPreference.java
+++ b/src/com/android/settings/network/telephony/NetworkOperatorPreference.java
@@ -260,6 +260,6 @@
         }
         final Context context = getContext();
         setIcon(MobileNetworkUtils.getSignalStrengthIcon(context, level, NUM_SIGNAL_STRENGTH_BINS,
-                getIconIdForCell(mCellInfo), false));
+                getIconIdForCell(mCellInfo), false, false));
     }
 }
diff --git a/tests/unit/src/com/android/settings/network/SubscriptionsPreferenceControllerTest.java b/tests/unit/src/com/android/settings/network/SubscriptionsPreferenceControllerTest.java
index ebcb102..c4abdd1 100644
--- a/tests/unit/src/com/android/settings/network/SubscriptionsPreferenceControllerTest.java
+++ b/tests/unit/src/com/android/settings/network/SubscriptionsPreferenceControllerTest.java
@@ -275,7 +275,8 @@
                 true, ServiceState.STATE_IN_SERVICE);
         doReturn(mock(MobileMappings.Config.class)).when(sInjector).getConfig(mContext);
         doReturn(networkType)
-                .when(sInjector).getNetworkType(any(), any(), any(), anyInt(), eq(false));
+                .when(sInjector).getNetworkType(any(), any(), any(), anyInt(), eq(false),
+                        eq(false));
 
         mController.onResume();
         mController.displayPreference(mPreferenceScreen);
@@ -295,7 +296,7 @@
                 true, ServiceState.STATE_IN_SERVICE);
         doReturn(mock(MobileMappings.Config.class)).when(sInjector).getConfig(mContext);
         doReturn(networkType)
-                .when(sInjector).getNetworkType(any(), any(), any(), anyInt(), eq(true));
+                .when(sInjector).getNetworkType(any(), any(), any(), anyInt(), eq(true), eq(false));
         doReturn(true).when(mWifiPickerTrackerHelper).isCarrierNetworkActive();
 
         mController.onResume();
@@ -317,7 +318,8 @@
         setupGetIconConditions(sub.get(0).getSubscriptionId(), false, false,
                 true, ServiceState.STATE_IN_SERVICE);
         doReturn(networkType)
-                .when(sInjector).getNetworkType(any(), any(), any(), anyInt(), eq(false));
+                .when(sInjector).getNetworkType(any(), any(), any(), anyInt(), eq(false),
+                        eq(false));
 
         mController.onResume();
         mController.displayPreference(mPreferenceScreen);
@@ -336,7 +338,8 @@
         setupGetIconConditions(sub.get(0).getSubscriptionId(), false, true,
                 true, ServiceState.STATE_IN_SERVICE);
         doReturn(networkType)
-                .when(sInjector).getNetworkType(any(), any(), any(), anyInt(), eq(false));
+                .when(sInjector).getNetworkType(any(), any(), any(), anyInt(), eq(false),
+                        eq(false));
         when(mTelephonyManager.isDataEnabled()).thenReturn(true);
 
         mController.onResume();
@@ -371,7 +374,8 @@
                 true, ServiceState.STATE_IN_SERVICE);
         doReturn(mock(MobileMappings.Config.class)).when(sInjector).getConfig(mContext);
         doReturn(networkType)
-                .when(sInjector).getNetworkType(any(), any(), any(), anyInt(), eq(false));
+                .when(sInjector).getNetworkType(any(), any(), any(), anyInt(), eq(false),
+                        eq(false));
         when(mTelephonyManager.isDataEnabled()).thenReturn(true);
 
         mController.onResume();
@@ -397,7 +401,8 @@
                 true, ServiceState.STATE_IN_SERVICE);
         doReturn(mock(MobileMappings.Config.class)).when(sInjector).getConfig(mContext);
         doReturn(networkType)
-                .when(sInjector).getNetworkType(any(), any(), any(), anyInt(), eq(false));
+                .when(sInjector).getNetworkType(any(), any(), any(), anyInt(), eq(false),
+                        eq(false));
 
         mController.onResume();
         mController.displayPreference(mPreferenceScreen);
@@ -424,7 +429,8 @@
                 false, ServiceState.STATE_OUT_OF_SERVICE);
         doReturn(mock(MobileMappings.Config.class)).when(sInjector).getConfig(mContext);
         doReturn(networkType)
-                .when(sInjector).getNetworkType(any(), any(), any(), anyInt(), eq(false));
+                .when(sInjector).getNetworkType(any(), any(), any(), anyInt(), eq(false),
+                        eq(false));
 
         mController.onResume();
         mController.displayPreference(mPreferenceScreen);
@@ -491,7 +497,7 @@
         doReturn(sub.get(0)).when(mSubscriptionManager).getDefaultDataSubscriptionInfo();
         Drawable icon = mock(Drawable.class);
         when(mTelephonyManager.isDataEnabled()).thenReturn(true);
-        doReturn(icon).when(sInjector).getIcon(any(), anyInt(), anyInt(), eq(false));
+        doReturn(icon).when(sInjector).getIcon(any(), anyInt(), anyInt(), eq(false), eq(false));
         setupGetIconConditions(sub.get(0).getSubscriptionId(), true, true,
                 true, ServiceState.STATE_IN_SERVICE);
 
@@ -509,7 +515,7 @@
         doReturn(subs.get(0)).when(mSubscriptionManager).getDefaultDataSubscriptionInfo();
         Drawable icon = mock(Drawable.class);
         when(mTelephonyManager.isDataEnabled()).thenReturn(true);
-        doReturn(icon).when(sInjector).getIcon(any(), anyInt(), anyInt(), eq(false));
+        doReturn(icon).when(sInjector).getIcon(any(), anyInt(), anyInt(), eq(false), eq(false));
         setupGetIconConditions(subId, false, true,
                 true, ServiceState.STATE_IN_SERVICE);
         mController.onResume();
@@ -527,7 +533,7 @@
         doReturn(subs.get(0)).when(mSubscriptionManager).getDefaultDataSubscriptionInfo();
         Drawable icon = mock(Drawable.class);
         when(mTelephonyManager.isDataEnabled()).thenReturn(false);
-        doReturn(icon).when(sInjector).getIcon(any(), anyInt(), anyInt(), eq(true));
+        doReturn(icon).when(sInjector).getIcon(any(), anyInt(), anyInt(), eq(true), eq(false));
 
         setupGetIconConditions(subId, false, false,
                 false, ServiceState.STATE_IN_SERVICE);
@@ -559,7 +565,8 @@
 
         mController.getIcon(SUB_ID);
 
-        verify(sInjector).getIcon(any(), eq(SIGNAL_STRENGTH_GOOD), anyInt(), anyBoolean());
+        verify(sInjector).getIcon(any(), eq(SIGNAL_STRENGTH_GOOD), anyInt(), anyBoolean(),
+                anyBoolean());
     }
 
     @Test
@@ -576,7 +583,7 @@
 
         mController.getIcon(SUB_ID);
 
-        verify(sInjector).getIcon(any(), eq(WIFI_LEVEL_MAX), anyInt(), anyBoolean());
+        verify(sInjector).getIcon(any(), eq(WIFI_LEVEL_MAX), anyInt(), anyBoolean(), anyBoolean());
     }
 
     @Test