iPadOS 12.1 (build 16B5084a) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2018-10-15T17:02:51Z. The update package is 165.62 MB. This is a delta (partial) update that requires 12.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c3111bd68fd2e7112fb605a5000673678388913b.zip.