iPadOS 11.3 (build 15E5201e) is an official Apple over-the-air update for the iPad Pro 2 (12.9-inch, Cellular), released on 2018-03-05T18:13:58Z. The update package is 268.98 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: 2d9f0d9ea1b28f722f1660ecd791a85e6b0eaba3.zip.