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 1.09 GB. This is a delta (partial) update that requires 8.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f7221292751b7d42cea4660477561b0ef4a0be15.zip.