iPadOS 9.0 (build 13A344) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2015-09-16T18:02:10Z. The update package is 1.17 GB. This is a delta (partial) update that requires 8.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4b05a8703e263964b0afe452c9416879519d3999.zip.