iPadOS 11.3 (build 15E5178f) is an official Apple over-the-air update for the iPad 5 (Cellular), released on 2018-02-06T18:21:11Z. The update package is 275.44 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: 2600fa20f85c6033aac4e14740c8c4e0041f7d84.zip.