On your smartphone, check that notifications are enabled for the Home + Security app. Note: Some Android manufacturers limit the functionality of background apps to maximize battery life. This may prevent you from receiving the Home + Security apps. You can find examples of how to do this on this link https://dontkillmyapp.com/ (Legrand Netatmo Bticino is not responsible for the content of this page). Finally, remember that a poor Wi-Fi signal can also cause notification issues.