2 files changed, 26 insertions, 4 deletions
diff --git a/libs/WifiTrackerLib/src/com/android/wifitrackerlib/Utils.java b/libs/WifiTrackerLib/src/com/android/wifitrackerlib/Utils.java
index 78617ba5a..ee115cecc 100644
--- a/libs/WifiTrackerLib/src/com/android/wifitrackerlib/Utils.java
+++ b/libs/WifiTrackerLib/src/com/android/wifitrackerlib/Utils.java
@@ -616,6 +616,9 @@ class Utils {
      * Get the SIM carrier name for target subscription Id.
      */
     static @Nullable String getCarrierNameForSubId(@NonNull Context context, int subId) {
+        if (subId == SubscriptionManager.INVALID_SUBSCRIPTION_ID) {
+            return null;
+        }
         TelephonyManager telephonyManager =
                 (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
         if (telephonyManager == null) return null;
@@ -639,9 +642,8 @@ class Utils {
      * Get the best match subscription Id for target WifiConfiguration.
      */
     static int getSubIdForConfig(@NonNull Context context, @NonNull WifiConfiguration config) {
-        int dataSubId = SubscriptionManager.getDefaultDataSubscriptionId();
         if (config.carrierId == TelephonyManager.UNKNOWN_CARRIER_ID) {
-            return dataSubId;
+            return SubscriptionManager.INVALID_SUBSCRIPTION_ID;
         }
         SubscriptionManager subscriptionManager =
                 (SubscriptionManager) context.getSystemService(
@@ -655,6 +657,7 @@ class Utils {
         }
 
         int matchSubId = SubscriptionManager.INVALID_SUBSCRIPTION_ID;
+        int dataSubId = SubscriptionManager.getDefaultDataSubscriptionId();
         for (SubscriptionInfo subInfo : subInfoList) {
             if (subInfo.getCarrierId() == config.carrierId) {
                 matchSubId = subInfo.getSubscriptionId();
@@ -689,8 +692,13 @@ class Utils {
         if (context == null || wifiConfig == null || !isSimCredential(wifiConfig)) {
             return "";
         }
-
-        int subId = getSubIdForConfig(context, wifiConfig);
+        int subId;
+        if (wifiConfig.carrierId == TelephonyManager.UNKNOWN_CARRIER_ID) {
+            // Config without carrierId use default data subscription.
+            subId = SubscriptionManager.getDefaultSubscriptionId();
+        } else {
+            subId = getSubIdForConfig(context, wifiConfig);
+        }
         if (subId == SubscriptionManager.INVALID_SUBSCRIPTION_ID
                 || isImsiPrivacyProtectionProvided(context, subId)) {
             return "";
diff --git a/libs/WifiTrackerLib/tests/src/com/android/wifitrackerlib/UtilsTest.java b/libs/WifiTrackerLib/tests/src/com/android/wifitrackerlib/UtilsTest.java
index aa0df1092..de4b6903c 100644
--- a/libs/WifiTrackerLib/tests/src/com/android/wifitrackerlib/UtilsTest.java
+++ b/libs/WifiTrackerLib/tests/src/com/android/wifitrackerlib/UtilsTest.java
@@ -344,6 +344,13 @@ public class UtilsTest {
     }
 
     @Test
+    public void testGetCarrierNameWithInvalidSubId() {
+        when(mSpecifiedTm.getSimCarrierIdName()).thenReturn(TEST_CARRIER_NAME);
+        assertNull(getCarrierNameForSubId(mMockContext,
+                SubscriptionManager.INVALID_SUBSCRIPTION_ID));
+    }
+
+    @Test
     public void testCheckRequireImsiPrivacyProtectionWithNoCarrierConfig() {
         assertFalse(isImsiPrivacyProtectionProvided(mMockContext, TEST_SUB_ID));
     }
@@ -379,6 +386,13 @@ public class UtilsTest {
     }
 
     @Test
+    public void testGetSubIdForWifiConfigurationWithoutCarrierId() {
+        WifiConfiguration config = new WifiConfiguration();
+        assertEquals(SubscriptionManager.INVALID_SUBSCRIPTION_ID,
+                getSubIdForConfig(mMockContext, config));
+    }
+
+    @Test
     public void testGetImsiProtectionDescription_isSimCredentialFalse_returnEmptyString() {
         final WifiConfiguration wificonfig = new WifiConfiguration();