iPadOS 9.3 (build 13E233) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2016-03-21T18:56:10Z. The update package is 271.91 MB. This is a delta (partial) update that requires 9.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 29ed80cd107f67cc5d1e9a89a92c6b5ecd570e82.zip.