In the event of a software failure on the iPhone, the device enters a fallback mode called “Recovery Mode,” denoted by a graphic of a USB connector and iTunes icon on the screen. This can happen in the event of a failure when you attempt to upgrade the firmware of the device. The iPhone is unusable while in Recovery Mode. You can exit Recovery Mode by restoring the iPhone to its original factory state or, in some cases, by turning the device off and back on. Warnings Writer Bio

How to Get Out of Recovery Mode on iPhone - 95