It must be acknowledged that push notifications can make your busy life relatively relaxed. It ensures that you will not miss any critical message. In the meanwhile, it is in a position to save you a good deal of time. However, sometimes the notification for some apps may not work as expected, which is really a headache. For example, some users latterly complained that they come across Facebook notifications not working on their iPhone. Is this an intractable problem to deal with? No! The following guide will show you how to clear up the issue for good.