iPadOS 12.3 (build 16F5117h) is an official Apple over-the-air update for the iPad Pro (10.5-inch, Cellular), released on 2019-03-27T17:06:11Z. The update package is 306.34 MB. This is a delta (partial) update that requires 12.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9f465056759d725c56a388e3cccedbb715ec78c5.zip.