iPadOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-05-17T17:01:58Z. The update package is 247.07 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: 23730fd5d961b655605b1e8d92ba1546967c2b8c.zip.