iPadOS 11.4 (build 15F5061d) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-05-01T17:05:41Z. The update package is 212.1 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: 2ba8a30d5d1d391a62c2a80fdab10d8e3aaa4497.zip.