iPadOS 11.3.1 (build 15E302) is an official Apple over-the-air update for the iPad Pro 9.7-inch (WiFi), released on 2018-04-24T17:08:14Z. The update package is 1.25 GB. This is a delta (partial) update that requires 10.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1fb9b0927cc003d9e7a564740a3237f86e47602f.zip.