iPadOS 12.0 (build 16A366) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2018-09-12T19:06:38Z. The update package is 1.18 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: f64aff422bfe24829f68108cdc53b681e9c10a01.zip.