iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2018-05-29T17:14:14Z. The update package is 1.24 GB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 47af68c3183b68c082f5a687a2dd20125fa338bd.zip.