fix iphone error 4014

When the latest iOS version is launched, most people choose to upgrade or restore their iPhones. Occasionally, some problems appear. For example, you may find a window to pop up, showing "The iPhone could not be restored. An unknown error occurred (4014)", which means your iPhone doesn't succeed to be upgraded. In the next content, I will explain the reasons of the error and provide you 10 different methods to fix this issue.