iPadOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2018-10-30T17:04:37Z. The update package is 1.23 GB. This is a delta (partial) update that requires 11.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fdd3ab32ca13652493bc0df4c95ca6f40883dcd4.zip.