iPadOS 12.3 (build 16F5148a) is an official Apple over-the-air update for the iPad Pro 3 (11-inch, Cellular, 1TB Model), released on 2019-04-29T17:35:56Z. The update package is 152.75 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: 5a864ea3334f21fb508bba4bab04914205ad4f8d.zip.