iPadOS 11.4.1 (build 15G5054c) is an official Apple over-the-air update for the iPad Air (China), released on 2018-05-30T17:04:41Z. The update package is 186.07 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: 2d4a76ce7eeca78d9acf5ba6af2564dfcbe01e34.zip.