iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad Pro 9.7-inch (WiFi), released on 2018-03-29T17:10:27Z. The update package is 1.21 GB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 297190a297bdc530e68a9b65dd400b067f297b1d.zip.