iPadOS 12.3 (build 16F5155a) is an official Apple over-the-air update for the iPad Pro 9.7-inch (Cellular), released on 2019-05-07T17:03:52Z. The update package is 356.15 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: 9506c7ab52bc678301206af42106f400688569c4.zip.