iPadOS 12.1.3 (build 16D5032a) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, Cellular), released on 2018-12-19T18:06:51Z. The update package is 283.83 MB. This is a delta (partial) update that requires 12.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2c468fbc15aa7af7a1ef4590a2778ee1bfb247e0.zip.