iPadOS 12.3 (build 16F5129d) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2019-04-08T17:04:23Z. The update package is 336.91 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: 4ef12500cc939673f98d809252396fb54e262b53.zip.