iPadOS 11.2.2 (build 15C202) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2018-01-08T18:10:02Z. The update package is 330.75 MB. This is a delta (partial) update that requires 11.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d44c75235f67cb5ed2030b136e9e328ec0843a7e.zip.