iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad 5 (Cellular), released on 2018-05-29T17:14:39Z. The update package is 1.26 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: 362cedcdbf18b3e9756b5b02cff1c3cc2bc16685.zip.