iPadOS 12.3 (build 16F5129d) is an official Apple over-the-air update for the iPad Pro 3 (11-inch, Cellular, 1TB Model), released on 2019-04-08T17:04:41Z. The update package is 325.76 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: 2bf0b56a1b13e6e73f0b66245c91482047bee5e7.zip.