iPadOS 11.4 (build 15F5049c) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, Cellular), released on 2018-04-16T17:07:57Z. The update package is 217.71 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: 24728b48c23fe22c096874c0d05ec59d6f60dbaa.zip.