Download iOS 5.1.1 Build 9B208 IPSW Firmware Restore Files
Download the IPSW iOS 5.1.1 (Build 9B208) firmware file released at 25 May 2012 intended to restore iPhone 4 (GSM) via iTunes. IPSW iOS 5.1.1 build 9B208 is unsigned by Apple to update Apple device software.