iPadOS 9.0 (build 13A4325c) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2015-08-06T18:44:15Z. The update package is 441.17 MB. This is a delta (partial) update that requires 9.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 714f9da75e232865434f3207f8505b6ceee12a5f.zip.