Check that you have enabled notifications on your phone.Check if the notification appears in your Android notification bar or tray.Confirm that the date and time settings for your phone are set correctly for your time zone.Upgrade your Android OS to the latest version that is available for your device.Update the Android System Webview app on your phone.Update the Google Play services app on your phone.

Update to the latest version of Signal Android.

Make sure that your VPN or other apps are not restricting Signal's ability to connect to the internet.

Check that your provider allows WebSocket connections.

If are on a campus or corporate Wi-Fi that has firewall restrictions in place, contact the network administrator.

Android phone Settings > Network & Internet > toggle to turn Airplane mode on and off.

Confirm that your phone is connected to the internet.

Steps to resolve will vary by phone model and OS.

macOS users will see notification text of 'New Message' for all Disappearing Messages regardless of the setting in Signal Settings > Preferences > Notifications.

Manage this option in Signal Settings > Notifications.

Notifications for reactions will only appear if you choose to display Name and message in the notification.

Android desktop note 9