How to Fix an iPhone in Recovery Mode
When something goes wrong with your iPhone, the iPhone automatically enters what's known as "Recovery Mode." Recovery Mode is a mode in which the iPhone will not allow anyone to access any of the iPhone's content or features until the device has been restored. Fully restoring the iPhone will allow you to remove Recovery Mode and access your content again.
Open iTunes on your PC.
Connect your iPhone to your computer via the iPod USB Cable. Wait for iTunes to recognize the device.
Click on the icon for the iPhone on the left side of the iTunes window.
Press the "Restore" button. Wait for the iPhone to be restored.