iPadOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPad Air (China), released on 2018-05-29T17:13:16Z. The update package is 1.24 GB. This is a delta (partial) update that requires 10.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a89664fc1bb4cee537f91835b700b8dd759dffd2.zip.