iPadOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2018-10-30T17:06:04Z. The update package is 332.23 MB. This is a delta (partial) update that requires 12.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c99356bc3aa5bcc9a28031a4edcaf4f6507d92b1.zip.