iPadOS 12.1.3 (build 16D40) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, Cellular, 1TB Model), released on 2019-01-22T18:14:59Z. The update package is 381.16 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: 1223cfd5975c2b610c2f659acb8483e66fb34d0c.zip.