iPadOS 13.3.1 (build 17D5026c) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, Cellular), released on 2019-12-17T18:13:19Z. 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: 02698c0527ae23fd14787252e06fdc0364919d4f.zip.