iPadOS 11.4 (build 15F5061d) is an official Apple over-the-air update for the iPad 6 (WiFi), released on 2018-05-01T17:05:59Z. The update package is 188.96 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: cd815edc7c4ede2630c83e6318cf7b374db89af5.zip.