iPadOS 13.3.1 (build 17D5026c) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, Cellular, 1TB Model), released on 2019-12-17T18:13:20Z. The update package is 214.32 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: b306ba6df049d9e49e0824cfb64e823c57f2a501.zip.