iPadOS 13.3.1 (build 17D5026c) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2019-12-17T18:13:00Z. The update package is 182.87 MB. This is a delta (partial) update that requires 13.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d7fef6daff686945e6720bc027f9e89849d83408.zip.