iPadOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPad 5 (WiFi), released on 2018-05-17T17:02:04Z. The update package is 292.43 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: b5cf594b4b50c72fc3ed531dc021e4360e3b8d26.zip.