iPadOS 12.0 (build 16A5327f) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2018-07-17T17:05:55Z. The update package is 1.13 GB. This is a delta (partial) update that requires 11.4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 58cefdfb3a9eab01c1fad8e7d4bbbae5b543eacb.zip.