iPadOS 9.2.1 (build 13D15) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2016-01-19T17:59:20Z. The update package is 1.33 GB. 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: f3c2722c9cd0440326f62814605914dd5db489dd.zip.