iPadOS 12.3 (build 16F5129d) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, Cellular), released on 2019-04-08T17:04:28Z. The update package is 286.33 MB. This is a delta (partial) update that requires 12.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d38898f15722200d7c7c3b71dfab230ba8b93840.zip.