iPadOS 12.0.1 (build 16A404) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2018-10-08T17:08:54Z. The update package is 1.18 GB. This is a delta (partial) update that requires 11.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9355b225e39c36412891f0d3d9ee9ec5abe6fa9d.zip.