iPadOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2018-05-17T17:02:01Z. The update package is 38.1 MB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 613b6bdd6bfda4a84d0c57ebc64ccfc07688a073.zip.