iPadOS 11.4 (build 15F5049c) is an official Apple over-the-air update for the iPad Pro (10.5-inch, WiFi), released on 2018-04-16T17:07:58Z. The update package is 217.77 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: fac42580994855f607709bef731c7d4d0f276069.zip.