iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-05-29T17:14:00Z. 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: cfb9c586b18a21416536bfc0dd7ab9ada576a096.zip.