iPadOS 11.3 (build 15E5211a) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2018-03-12T17:05:30Z. The update package is 219.13 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: dd4fa311fa3d949261ef31a932d3b3175c8b3f5f.zip.