iPadOS 12.1 (build 16B5068i) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2018-10-02T17:11:28Z. The update package is 341.17 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: 414b1d7ba652486cee4d144151cd4945a40180d5.zip.