iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad 5 (Cellular), released on 2018-03-29T17:10:14Z. The update package is 1.22 GB. This is a delta (partial) update that requires 10.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 469425e2d557f0fb294c4d7469cb75cecd952bc2.zip.