iPadOS 9.2.1 (build 13D15) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2016-01-19T17:59:37Z. The update package is 291.28 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: b9ec4b0f54c0ae7331150dc4e1bd8cb466733e64.zip.