iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2019-01-22T18:07:34Z. The update package is 1.24 GB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 48323ae88d36eb0c1a69ccfcea2ff1b0c96db0be.zip.