diff --git a/src/com/android/messaging/datamodel/MessageNotificationState.java b/src/com/android/messaging/datamodel/MessageNotificationState.java
index 4a4bfd5..fd82f74 100644
--- a/src/com/android/messaging/datamodel/MessageNotificationState.java
+++ b/src/com/android/messaging/datamodel/MessageNotificationState.java
@@ -55,6 +55,7 @@ import com.android.messaging.util.BugleGservicesKeys;
 import com.android.messaging.util.ContentType;
 import com.android.messaging.util.ConversationIdSet;
 import com.android.messaging.util.LogUtil;
+import com.android.messaging.util.NotificationsUtil;
 import com.android.messaging.util.PendingIntentConstants;
 import com.android.messaging.util.UriUtil;
 import com.google.common.collect.Lists;
@@ -774,7 +775,8 @@ public abstract class MessageNotificationState extends NotificationState {
             bigText.append("\n\n").append(statusText);
         }
 
-        final NotificationCompat.Builder notifBuilder = new NotificationCompat.Builder(context);
+        final NotificationCompat.Builder notifBuilder = new NotificationCompat.Builder(context,
+                NotificationsUtil.DEFAULT_CHANNEL_ID);
         final NotificationCompat.Style notifStyle =
                 new NotificationCompat.BigTextStyle(notifBuilder).bigText(bigText);
         notifBuilder.setStyle(notifStyle);
@@ -1196,7 +1198,8 @@ public abstract class MessageNotificationState extends NotificationState {
                 }
                 if (failedMessages.size() > 0) {
                     final NotificationCompat.Builder builder =
-                            new NotificationCompat.Builder(context);
+                            new NotificationCompat.Builder(context,
+                                    NotificationsUtil.DEFAULT_CHANNEL_ID);
 
                     CharSequence line1;
                     CharSequence line2;
diff --git a/src/com/android/messaging/receiver/SmsReceiver.java b/src/com/android/messaging/receiver/SmsReceiver.java
index c36e9ab..89a3710 100644
--- a/src/com/android/messaging/receiver/SmsReceiver.java
+++ b/src/com/android/messaging/receiver/SmsReceiver.java
@@ -48,6 +48,7 @@ import com.android.messaging.util.BugleGservices;
 import com.android.messaging.util.BugleGservicesKeys;
 import com.android.messaging.util.DebugUtils;
 import com.android.messaging.util.LogUtil;
+import com.android.messaging.util.NotificationsUtil;
 import com.android.messaging.util.OsUtil;
 import com.android.messaging.util.PendingIntentConstants;
 import com.android.messaging.util.PhoneUtils;
@@ -260,7 +261,8 @@ public final class SmsReceiver extends BroadcastReceiver {
         final PendingIntent pendingIntent = UIIntents.get()
                 .getPendingIntentForSecondaryUserNewMessageNotification(context);
 
-        final NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
+        final NotificationCompat.Builder builder = new NotificationCompat.Builder(context,
+                NotificationsUtil.DEFAULT_CHANNEL_ID);
         builder.setContentTitle(resources.getString(R.string.secondary_user_new_message_title))
                 .setTicker(resources.getString(R.string.secondary_user_new_message_ticker))
                 .setSmallIcon(R.drawable.ic_sms_light)
diff --git a/src/com/android/messaging/sms/SmsStorageStatusManager.java b/src/com/android/messaging/sms/SmsStorageStatusManager.java
index 4f03195..6bd68cb 100644
--- a/src/com/android/messaging/sms/SmsStorageStatusManager.java
+++ b/src/com/android/messaging/sms/SmsStorageStatusManager.java
@@ -25,6 +25,7 @@ import androidx.core.app.NotificationManagerCompat;
 import com.android.messaging.Factory;
 import com.android.messaging.R;
 import com.android.messaging.ui.UIIntents;
+import com.android.messaging.util.NotificationsUtil;
 import com.android.messaging.util.PendingIntentConstants;
 import com.android.messaging.util.PhoneUtils;
 
@@ -65,7 +66,8 @@ public class SmsStorageStatusManager {
         final PendingIntent pendingIntent = UIIntents.get()
                 .getPendingIntentForLowStorageNotifications(context);
 
-        final NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
+        final NotificationCompat.Builder builder = new NotificationCompat.Builder(context,
+                NotificationsUtil.DEFAULT_CHANNEL_ID);
         builder.setContentTitle(resources.getString(R.string.sms_storage_low_title))
                 .setTicker(resources.getString(R.string.sms_storage_low_notification_ticker))
                 .setSmallIcon(R.drawable.ic_failed_light)