iPadOS 11.2 (build 15C5110b) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2017-11-17T18:13:55Z. The update package is 33.55 MB. This is a delta (partial) update that requires 11.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 542b01c3481f450a0695fd2af36598f140120f75.zip.