iPadOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2016-03-31T16:52:45Z. The update package is 436.65 MB. This is a delta (partial) update that requires 9.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bb8c8be1b58cd50b3b68b1df496d1bdb4366a21d.zip.