iPadOS 12.1.3 (build 16D5032a) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, WiFi, 1TB Model), released on 2018-12-19T18:06:51Z. The update package is 317.23 MB. This is a delta (partial) update that requires 12.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6f014ceb9516e8cbcfc8642f7d104b452f4c416a.zip.