iPadOS 13.3.1 (build 17D5044a) is an official Apple over-the-air update for the iPad Pro 3 (11-inch, Cellular, 1TB Model), released on 2020-01-14T18:20:54Z. The update package is 202.41 MB. This is a delta (partial) update that requires 13.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 065ef30aa3dc842ad58e5bc75f7f2df1a57323d0.zip.