Couldn’t get your notification alerts to work properly on your iPhone 7 Plus after updating to iOS 11? If that is so, then you need to do something on your end to make it work again. But the question is on how are you going to fix your iPhone 7 Plus notification that is not
Notification alerts in mobile devices are designed to give us a heads-up about incoming messages, phone calls, updates, and other relevant information. The importance of notification alerts however is often realize only when important calls or messages are expected. And this is one of the reasons why notification feature can be turned on or off.