iPadOS 11.4 (build 15F5049c) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2018-04-16T17:07:28Z. The update package is 212.94 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: 393052b7dbdc917f88feadfd7513cefce9604174.zip.