iPadOS 11.4 (build 15F5061d) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2018-05-01T17:05:46Z. The update package is 212.22 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: 8484b6e48be3e1671a7f3e3fa4e410a56b53450c.zip.