iPadOS 11.2.2 (build 15C202) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2018-01-08T18:14:14Z. The update package is 359.15 MB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4d75a507fbb0bbe8b48347426000d089457be327.zip.