iPadOS 12.1.1 (build 16C5043b) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2018-11-07T21:08:34Z. The update package is 287.11 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: 2c743d17a7523793b30d8d320310069901131253.zip.