iPadOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPad 6 (Cellular), released on 2018-05-17T17:02:17Z. The update package is 45.75 MB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 315e4ce2595539bb7af667fe709b680de5eb01d9.zip.