iPadOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, WiFi), released on 2018-05-17T17:02:12Z. The update package is 258.03 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: 215b9fbfe79b90c3996e4d6224eaf07246ffde99.zip.