iPadOS 12.3 (build 16F5156a) is an official Apple over-the-air update for the iPad Pro 9.7-inch (Cellular), released on 2019-05-10T17:08:41Z. The update package is 356.18 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: 16d0f8beaed46b4da98f1d50f71a3c979aa58528.zip.