iPadOS 11.4 (build 15F5061d) is an official Apple over-the-air update for the iPad Pro 9.7-inch (Cellular), released on 2018-05-01T17:05:51Z. The update package is 213.51 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: 29e2209e2d0bc420f0bf98f447c8557253ff6668.zip.