iPadOS 11.4 (build 15F5037c) is an official Apple over-the-air update for the iPad Pro 9.7-inch (Cellular), released on 2018-04-02T17:06:40Z. The update package is 237.55 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: bf35a1935e3592c6d757f460e45d87e2975a6a11.zip.