How do I replace a broken home button on the iPhone?
When the home button on an iPhone breaks or isn't working properly, it can make using the iOS device incredibly inconvenient. Luckily, there are many ways to replace the functionality of the home button if repair is not an option.
iOS 7 has a built-in virtual home button that can be switched on under Settings.
Navigate to Settings -> General -> Accessibility -> AssistiveTouch.