iPadOS 12.3 (build 16F5129d) is an official Apple over-the-air update for the iPad Pro (10.5-inch, Cellular), released on 2019-04-08T17:04:31Z. The update package is 353.58 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: a6fde2f27fac540b91268931bb151946b11ad1f9.zip.