iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2018-05-29T17:13:38Z. The update package is 707.3 MB. This is a delta (partial) update that requires 11.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d436c9ffdbc5a069e883266bb920e2db5c4b582d.zip.