iPadOS 11.3.1 (build 15E302) is an official Apple over-the-air update for the iPad Pro 9.7-inch (WiFi), released on 2018-04-24T17:08:24Z. The update package is 31.94 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: 4a2a32f5e8cc881aff0a978e1cc931d13f21acef.zip.