diff --git a/services/core/java/com/android/server/pm/UserManagerService.java b/services/core/java/com/android/server/pm/UserManagerService.java
index 92fd904..b53d83b 100644
--- a/services/core/java/com/android/server/pm/UserManagerService.java
+++ b/services/core/java/com/android/server/pm/UserManagerService.java
@@ -88,6 +88,7 @@
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.app.IAppOpsService;
 import com.android.internal.logging.MetricsLogger;
+import com.android.internal.os.BackgroundThread;
 import com.android.internal.util.DumpUtils;
 import com.android.internal.util.FastXmlSerializer;
 import com.android.internal.util.Preconditions;
@@ -387,7 +388,9 @@
             }
             final IntentSender target = intent.getParcelableExtra(Intent.EXTRA_INTENT);
             final int userHandle = intent.getIntExtra(Intent.EXTRA_USER_ID, UserHandle.USER_NULL);
-            setQuietModeEnabled(userHandle, false, target);
+            // Call setQuietModeEnabled on bg thread to avoid ANR
+            BackgroundThread.getHandler()
+                    .post(() -> setQuietModeEnabled(userHandle, false, target));
         }
     };