iPadOS 11.4 (build 15F5049c) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2018-04-16T17:07:40Z. The update package is 212.92 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: 18003d21852b836db77ebc207994ca1498ae1d1d.zip.