iPadOS 11.4 (build 15F5037c) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2018-04-02T17:06:31Z. The update package is 249.05 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: e486bac0ca42ee334a3bcdb103d4e7118eef1247.zip.