iPadOS 12.1.3 (build 16D40) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, Cellular), released on 2019-01-22T18:14:58Z. The update package is 316.64 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: 56aeaebe576ebf022160c3bfc389cac24929b2ed.zip.