iPadOS 9.3 (build 13E233) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2016-03-21T18:56:10Z. The update package is 293.8 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: 3f88a71b1a4b576a6653af1722ad0bd8b0a9b20b.zip.