iPadOS 12.1 (build 16B5084a) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2018-10-15T17:03:02Z. The update package is 356.15 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 921fd801b8d8ceb96ea3c97a560083c2c91983c9.zip.