Download iOS 12.1.1 Build 16C50 IPSW Firmware Restore Files
Download the IPSW iOS 12.1.1 (Build 16C50) firmware file released at 05 December 2018 intended to restore iPhone XS Max (China) via iTunes. IPSW iOS 12.1.1 build 16C50 is unsigned by Apple to update Apple device software.