Check on your smartphone if the Home + Security app notifications are enabled. Note: Some Android smartphone manufacturers limit the functionality of background apps to maximize battery life. These settings may prevent you from receiving notifications from the Home + Security app. For example, you can find several methods on this link https://dontkillmyapp.com/ (Legrand Netatmo Bticino is not responsible for the content of this site.) Finally, keep in mind that a weak WiFi signal can also cause notification issues.