iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-05-29T17:14:04Z. The update package is 238.88 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: 8247d68450fff13b3a4c584b1f266a78ab1d9c1f.zip.