iPadOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPad Pro 9.7-inch (WiFi), released on 2018-05-17T17:02:07Z. The update package is 252.56 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: cfd3484cce5d801791b54c14f5c0044041eafbce.zip.