It's seems to be a glitch of some sort (possibly related to some app or update being downloaded or stuck in some way from the App Store). Restarting the phone usually clears it up for most people.
It's seems to be a glitch of some sort (possibly related to some app or update being downloaded or stuck in some way from the App Store). Restarting the phone usually clears it up for most people.
This is a bug, I notice mainly when I've used safari or sometimes mail and it leads you believing the apps are still doing something despite even closing the app completely!