Download iPadOS 11.3.1 Build 15E302 IPSW Firmware Restore Files
Download the IPSW iPadOS 11.3.1 (Build 15E302) firmware file released at 24 April 2018 intended to restore iPad Air (Cellular) via iTunes. IPSW iPadOS 11.3.1 build 15E302 is unsigned by Apple to update Apple device software.
