iPadOS 12.1.3 (build 16D5037a) is an official Apple over-the-air update for the iPad Pro (10.5-inch, Cellular), released on 2019-01-07T18:06:51Z. The update package is 227.14 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: 315b2b293733085352c5182a078bb0ff435cfc86.zip.