iPadOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPad 5 (Cellular), released on 2018-05-17T17:02:05Z. The update package is 292.58 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: 8e228b21be46cb454eaa4132480df57fd1bb526d.zip.