iPadOS 11.4.1 (build 15G77) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2018-07-09T17:08:52Z. The update package is 596.37 MB. This is a delta (partial) update that requires 11.2.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 283f6f9b17b15ccdeec797b00d2bb7814504a713.zip.