iPadOS 9.2.1 (build 13D15) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2016-01-19T17:59:21Z. The update package is 1.14 GB. This is a delta (partial) update that requires 8.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0be706b6bf2ea096157b5d96f3269ca233de7ace.zip.