1. Connect the iPhone 4 to a PC via the supplied USB cable
2. Launch iTunes. iTunes should automatically detect the iPhone and connect to the internet to unbrick it
3. The iPhone will display 'iPhone is activated' when unbricking is complet
Note: Unbricking is automatic upon connection with iTunes when connected to the internet; therefore Unbricking your iPhone4 requires an active internet connection and iTunes 9.2 or later