iPadOS 11.4 (build 15F5061d) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, Cellular), released on 2018-05-01T17:05:56Z. The update package is 174.99 MB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 400e00427bc7dbccc33872069f375bd6632a83bd.zip.