iPadOS 11.4 (build 15F5061d) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-05-01T17:05:42Z. The update package is 180.27 MB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c789eb781bfd2fb00683a1bb6095add33edab2f5.zip.