iPadOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2018-10-30T17:04:32Z. The update package is 1.19 GB. This is a delta (partial) update that requires 11.2.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8190e988f6b22497aa4e434d8b22c7247b40ad1e.zip.