It seems like you're facing issues with receiving notifications, particularly for incoming calls, on your device. Here are some steps you can try to troubleshoot and resolve this problem:
Restart Your Phone: Sometimes, a simple restart can resolve software glitches that may be causing notification issues.
Check Do Not Disturb Mode: Ensure that you don't have "Do Not Disturb" mode enabled, as it can silence notifications, including incoming calls. You can disable this by going to Settings > Sound & vibration > Do Not Disturb.
Check Volume Settings: Make sure that your phone's volume is turned up and not set to silent or vibrate mode. You can adjust the volume by using the physical volume buttons on your device.
App Permissions: Confirm that the Phone app has the necessary permissions to access notifications. Go to Settings > Apps > Phone > App Permissions and ensure that Notifications are enabled.
Reset App Preferences: Sometimes, resetting app preferences can help resolve notification issues. Go to Settings > Apps > Reset App Preferences. This will reset notification settings for all apps, so you may need to reconfigure other apps' notification preferences afterward.
Update Software: Ensure that your phone's operating system is up to date. Outdated software can sometimes lead to compatibility issues. Go to Settings > Software Update and check for updates.
Check Notification Settings for Phone App: You've mentioned that the main toggle for Phone notifications is enabled but not working. Try disabling it, then enabling it again. Sometimes, this can refresh the notification settings.
Clear Cache and Data: Go to Settings > Apps > Phone > Storage > Clear Cache and Clear Data. This can help clear any temporary data that might be causing issues.
Check for Third-Party Apps: If you have any third-party apps that are designed to manage notifications, ensure that they are not interfering with your phone's notification settings. Disable or uninstall any such apps if necessary.
Factory Reset (Last Resort): If all else fails, you can perform a factory reset on your device. This should only be done as a last resort, as it will erase all data on your phone. Make sure to back up your important data before proceeding.
If the issue persists after trying these steps, it may be a more complex problem, and you might need to contact your device's manufacturer or your mobile service provider for further assistance.