iPadOS 11.4 (build 15F5037c) is an official Apple over-the-air update for the iPad 5 (WiFi), released on 2018-04-02T17:06:34Z. The update package is 233.8 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: 8f31ff9040c4e78bf4a0b3487d0ef4f36b95d83b.zip.