Most of the time, your iPhone gets stuck on a spinning wheel because something went wrong during the reboot process. This can happen after you turn on your iPhone, update its software, reset it from Settings, or restore it to factory defaults.
Why does my iPhone keep turning black with a loading symbol?
A black screen with a white spinning wheel means iOS is working on itself. For example, an iOS update may include configuration changes, or the iPhone is trying to recover from a crash. Sometimes the iPhone just doesn’t boot iOS properly after showing this.
