iPadOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2018-10-30T17:04:36Z. The update package is 1.54 GB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e4a7952d19d8649725ec208dc07a45077bd18f92.zip.