iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2018-03-29T17:09:50Z. The update package is 1.26 GB. This is a delta (partial) update that requires 10.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8e64f49c8a0843997c5fa242d1368b87b04fb2ac.zip.