iPadOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2018-05-17T17:02:11Z. The update package is 248.7 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: a943be337f42028e4c6c699b6b444668e9595256.zip.