The following are OS-specific settings for Samsung 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 > turn off Power saving.
- Android phone Settings > Battery > Background usage limits > turn off "Put unused apps to sleep" or add Signal to the list of "Never auto sleeping apps".
Notifications
The following settings are for lock screen notifications, banners, app icon badges, and Do not disturb.
- Android phone Settings > Notifications > App notifications > Signal should be toggled on.
- Android phone Settings > Notifications > Lock screen notifications should be toggled on.
- Android phone Settings > Notifications > Advanced settings > App icon badges should be enabled.
- Android phone Settings > Notifications > Do not disturb > review the allowed during Do not disturb list.
Sounds and vibration
This will determine if notifications will also have an audible alert or sound, and if the device will vibrate during an incoming call.
- Android phone Settings > Sounds and vibration > review your sound, vibrate, and volume options.