iPadOS 11.4 (build 15F5037c) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-04-02T17:06:29Z. The update package is 249.32 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: 0b170d91c76ad600afd4a275c8cb5463fd588045.zip.