iPadOS 12.0 (build 16A366) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2018-09-12T19:05:08Z. The update package is 1.15 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: cdc067f383150d9ec7b0e3be74738bad713a71c6.zip.