iPadOS 11.3 (build 15E5178f) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2018-02-06T18:21:12Z. The update package is 276.15 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: b57992211ee2ed6869a913d02086534453477fea.zip.