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 246.74 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: a6475fda001997aded468af4d13f281daf364907.zip.