iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2018-05-29T17:13:39Z. The update package is 586.64 MB. This is a delta (partial) update that requires 11.2.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ca95497c90b40f26075117692aef2eb11644d3f4.zip.