iPadOS 11.4 (build 15F5071a) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-05-07T17:11:06Z. The update package is 246.69 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: 7f6e4be8300bb53a461a1f0305c042a655a82fad.zip.