iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad 5 (Cellular), released on 2018-03-29T17:10:19Z. The update package is 708.47 MB. This is a delta (partial) update that requires 11.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 495ff7d18d580228f6f20e0a778a8b66b0a262d8.zip.