iPadOS 11.4 (build 15F5049c) is an official Apple over-the-air update for the iPad Pro 9.7-inch (WiFi), released on 2018-04-16T17:07:48Z. The update package is 216.8 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: 72444232f0349099f06b7e1237eaf4b9d371edd5.zip.