Download iPadOS 11.2.1 Build 15C153 IPSW Firmware Restore Files
Download the IPSW iPadOS 11.2.1 (Build 15C153) firmware file released at 13 December 2017 intended to restore iPad Air (China) via iTunes. IPSW iPadOS 11.2.1 build 15C153 is unsigned by Apple to update Apple device software.