diff --git a/src/com/android/settings/datausage/DataUsageList.java b/src/com/android/settings/datausage/DataUsageList.java
index aa6619755d1..735532a5e2c 100644
--- a/src/com/android/settings/datausage/DataUsageList.java
+++ b/src/com/android/settings/datausage/DataUsageList.java
@@ -135,8 +135,8 @@ public class DataUsageList extends DataUsageBaseFragment {
         mUidDetailProvider = new UidDetailProvider(activity);
         mTelephonyManager = activity.getSystemService(TelephonyManager.class);
         mUsageAmount = findPreference(KEY_USAGE_AMOUNT);
-        mChart = (ChartDataUsagePreference) findPreference(KEY_CHART_DATA);
-        mApps = (PreferenceGroup) findPreference(KEY_APPS_GROUP);
+        mChart = findPreference(KEY_CHART_DATA);
+        mApps = findPreference(KEY_APPS_GROUP);
         processArgument();
     }
 
@@ -306,7 +306,7 @@ public class DataUsageList extends DataUsageBaseFragment {
         getLoaderManager().restartLoader(LOADER_SUMMARY, null /* args */,
                 mNetworkStatsDetailCallbacks);
 
-        final long totalBytes = mCycleData != null
+        final long totalBytes = mCycleData != null && !mCycleData.isEmpty()
             ? mCycleData.get(mCycleSpinner.getSelectedItemPosition()).getTotalUsage() : 0;
         final CharSequence totalPhrase = DataUsageUtils.formatDataUsage(getActivity(), totalBytes);
         mUsageAmount.setTitle(getString(R.string.data_used_template, totalPhrase));
diff --git a/src/com/android/settings/datausage/DataUsageSummary.java b/src/com/android/settings/datausage/DataUsageSummary.java
index 36614103184..ad4e1e21708 100644
--- a/src/com/android/settings/datausage/DataUsageSummary.java
+++ b/src/com/android/settings/datausage/DataUsageSummary.java
@@ -87,7 +87,7 @@ public class DataUsageSummary extends DataUsageBaseFragment implements DataUsage
 
         boolean hasMobileData = DataUsageUtils.hasMobileData(context);
 
-        int defaultSubId = DataUsageUtils.getDefaultSubscriptionId(context);
+        final int defaultSubId = SubscriptionManager.getDefaultDataSubscriptionId();
         if (defaultSubId == SubscriptionManager.INVALID_SUBSCRIPTION_ID) {
             hasMobileData = false;
         }
diff --git a/tests/robotests/src/com/android/settings/datausage/DataUsageSummaryTest.java b/tests/robotests/src/com/android/settings/datausage/DataUsageSummaryTest.java
index 66f916e9962..79c3ad10cbf 100644
--- a/tests/robotests/src/com/android/settings/datausage/DataUsageSummaryTest.java
+++ b/tests/robotests/src/com/android/settings/datausage/DataUsageSummaryTest.java
@@ -31,6 +31,7 @@ import static org.mockito.Mockito.verify;
 import android.app.usage.NetworkStatsManager;
 import android.content.Context;
 import android.net.NetworkPolicyManager;
+import android.telephony.SubscriptionManager;
 
 import androidx.fragment.app.FragmentActivity;
 
@@ -50,6 +51,7 @@ import org.robolectric.RobolectricTestRunner;
 import org.robolectric.RuntimeEnvironment;
 import org.robolectric.annotation.Config;
 import org.robolectric.shadows.ShadowApplication;
+import org.robolectric.shadows.ShadowSubscriptionManager;
 
 @Config(shadows = {
         ShadowUtils.class,
@@ -114,10 +116,11 @@ public class DataUsageSummaryTest {
     }
 
     @Test
+    @Config(shadows = ShadowSubscriptionManager.class)
     public void configuration_withSim_shouldShowMobileAndWifi() {
         ShadowDataUsageUtils.IS_MOBILE_DATA_SUPPORTED = true;
         ShadowDataUsageUtils.IS_WIFI_SUPPORTED = true;
-        ShadowDataUsageUtils.DEFAULT_SUBSCRIPTION_ID = 1;
+        ShadowSubscriptionManager.setDefaultDataSubscriptionId(1);
         ShadowDataUsageUtils.HAS_SIM = true;
 
         final DataUsageSummary dataUsageSummary = spy(new DataUsageSummary());
@@ -170,4 +173,26 @@ public class DataUsageSummaryTest {
         verify(dataUsageSummary).addWifiSection();
         verify(dataUsageSummary, never()).addMobileSection(anyInt());
     }
+
+    @Test
+    @Config(shadows = ShadowSubscriptionManager.class)
+    public void configuration_invalidDataSusbscription_shouldShowWifiSectionOnly() {
+        ShadowDataUsageUtils.IS_MOBILE_DATA_SUPPORTED = true;
+        ShadowDataUsageUtils.IS_WIFI_SUPPORTED = true;
+        ShadowDataUsageUtils.HAS_SIM = false;
+        ShadowSubscriptionManager.setDefaultDataSubscriptionId(
+            SubscriptionManager.INVALID_SUBSCRIPTION_ID);
+
+        final DataUsageSummary dataUsageSummary = spy(new DataUsageSummary());
+        doReturn(mContext).when(dataUsageSummary).getContext();
+
+        doReturn(true).when(dataUsageSummary).removePreference(anyString());
+        doNothing().when(dataUsageSummary).addWifiSection();
+        doNothing().when(dataUsageSummary).addMobileSection(1);
+
+        dataUsageSummary.onCreate(null);
+
+        verify(dataUsageSummary).addWifiSection();
+        verify(dataUsageSummary, never()).addMobileSection(anyInt());
+    }
 }