iPadOS 9.2.1 (build 13D15) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2016-01-19T17:59:23Z. The update package is 303.33 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: 47ebd4ae7373807d3797ca2518ba38c72cb8def6.zip.