Download iPadOS 11.1.1 Build 15B150 IPSW Firmware Restore Files
Download the IPSW iPadOS 11.1.1 (Build 15B150) firmware file released at 09 November 2017 intended to restore iPad Air (Cellular) via iTunes. IPSW iPadOS 11.1.1 build 15B150 is unsigned by Apple to update Apple device software.