Download iPadOS 9.3.1 Build 13E238 IPSW Firmware Restore Files
Download the IPSW iPadOS 9.3.1 (Build 13E238) firmware file released at 31 March 2016 intended to restore iPad Air (Cellular) via iTunes. IPSW iPadOS 9.3.1 build 13E238 is unsigned by Apple to update Apple device software.