iPadOS 11.4 (build 15F5077a) is an official Apple over-the-air update for the iPad Pro 9.7-inch (Cellular), released on 2018-05-14T17:17:02Z. The update package is 252.66 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: 60aede6d4896a86cd7773d02880ef8351976799c.zip.