iPadOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2018-05-17T17:01:55Z. The update package is 222.73 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: e21dd60a8294734a7b22e8b9de77330a4b3bfd79.zip.