iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2019-01-22T18:07:29Z. The update package is 1.68 GB. This is a delta (partial) update that requires 10.3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b15e8a78225e24eaec1eab9e560044a260443a8f.zip.