iPadOS 12.1.3 (build 16D5039a) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, Cellular, 1TB Model), released on 2019-01-10T18:08:53Z. The update package is 324.21 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: 8ffca708271ff8ae97765daa8e1320ba207d0d7f.zip.