This model connects via the Connect 4G communal outdoor panel, rather than directly via Wi-Fi.
The app works thanks to the connectivity of the outdoor panel. Therefore, if the video door entry system loses its internet connection, you will not be able to access the app or receive calls.
If the app was previously working (i.e. the outdoor panel had an internet connection) and has subsequently lost its signal, we recommend that you contact our support team support via the app by going to Settings - General tab - Contact Fermax so that our team can review your case in more detail.