iPadOS 11.3.1 (build 15E302) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, Cellular), released on 2018-04-24T17:09:10Z. The update package is 696.65 MB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 779a24e8845021bc39d078b01ae9bc23eaa4ba07.zip.