Download iPadOS 9.2.1 Build 13D20 IPSW Firmware Restore Files
Download the IPSW iPadOS 9.2.1 (Build 13D20) firmware file released at 18 February 2016 intended to restore iPad Air 2 (Cellular) via iTunes. IPSW iPadOS 9.2.1 build 13D20 is unsigned by Apple to update Apple device software.