The following are device specific Settings for Xiaomi Redmi Note 9 devices that may affect notifications.
Battery Optimization
Notifications may not work properly if any power saving mode is enabled, or if power usage is managed in the background.
- Android phone Settings > Battery > Current Mode > Performance mode should be selected.
- Android phone Settings > Battery > Additional features > Turn off mobile data when device is locked > Never should be selected.
Show notification icons
This will change how notifications are displayed in the status bar. If this is set to "None" you will not see app icons for notifications in the status bar.
- Android phone Settings > Notifications and Control center > Status Bar > Enable Show notification icons.
Floating notifications
This will change how floating notifications are displayed at the top of the screen.
- Android phone Settings > Notifications and Control center > Floating notifications > Signal > Allow Floating notifications.
Within Floating notification settings, you have the option to turn off notifications for a specific chat within Signal.
- Android phone Settings > Notifications and Control center > Floating notifications > Signal > Chats > Tap on your chat > Allow "Show notifications" and "Allow floating notifications".
Notification badges
If you'd like to see an indicator on the app icon that displays how many new unread messages you have you must have notification badges allowed.
Android phone Settings > Notifications and Control center > Badges > Signal > Allow notification badges.