Download iPodOS 5.1 Build 9B176 IPSW Firmware Restore Files
Download the IPSW iPodOS 5.1 (Build 9B176) firmware file released at 29 February 2012 intended to restore iPod touch 4 via iTunes. IPSW iPodOS 5.1 build 9B176 is unsigned by Apple to update Apple device software.
