Download iOS 11.1.1 Build 15B150 IPSW Firmware Restore Files
Download the IPSW iOS 11.1.1 (Build 15B150) firmware file released at 09 November 2017 intended to restore iPhone 8 (Global) via iTunes. IPSW iOS 11.1.1 build 15B150 is unsigned by Apple to update Apple device software.