iPadOS 13.3.1 (build 17D5050a) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2020-01-22T18:07:03Z. The update package is 85.28 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: 936c438b160034beb001c9edcbcacadac5c078ec.zip.