iPadOS 11.4 (build 15F5077a) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-05-14T17:16:54Z. The update package is 247.06 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: 8c3abb4d649007023f7cb43600e28fb74a30ce5a.zip.