iPadOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPad Pro 9.7-inch (WiFi), released on 2016-03-31T16:54:21Z. The update package is 27.81 MB. This is a delta (partial) update that requires 9.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4228ff586ce2661e5940c59fc451df777fafe4f1.zip.