iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, Cellular), released on 2019-01-22T18:07:54Z. The update package is 301.05 MB. This is a delta (partial) update that requires 12.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f108429e7edbd2d21b8999553b24845422353976.zip.