iPadOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, Cellular), released on 2018-05-17T17:02:13Z. The update package is 257.72 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: 27f068ea756d42b9184df7758214227b4fb7ea76.zip.