A. 1. Check notification settings: Go to Settings > Apps > Nicegram > Notifications and ensure notifications are enabled. 2. Disable battery saver mode: If your device is in battery saver mode, it may restrict background activity. Go to Settings > Battery and disable battery saver.

B. 3. Clear app data: Go to Settings > Apps > Nicegram > Storage > Clear Data. Note that this will reset the app, so you may need to log in again.