iPadOS 11.3 (build 15E5211a) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2018-03-12T17:05:36Z. The update package is 202.73 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 612e97759bbf05e475fcbd2ec47ea356fd42287a.zip.