iPadOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2018-10-30T17:05:58Z. The update package is 1.6 GB. This is a delta (partial) update that requires 10.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b6646f3d222ad097ef8f165dfbb8cc32a21f61df.zip.