iPadOS 11.4 (build 15F5077a) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2018-05-14T17:17:04Z. The update package is 248.67 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: a12fbf40a753ecb8dd4aca984d8760a00db2d1c2.zip.