iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2018-05-29T17:15:16Z. The update package is 1.3 GB. This is a delta (partial) update that requires 10.3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8708503bc45b58b1bb2df5c2ebecddf49f1e1c6f.zip.