iPadOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-05-17T17:01:59Z. The update package is 37.48 MB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 64cf36e9da569ca97af418e5b814dd791827322f.zip.