iPadOS 11.4 (build 15F5061d) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, WiFi), released on 2018-05-01T17:05:54Z. The update package is 215.11 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: 703c0af537060880fa0267e3810301fe2534adac.zip.