iPadOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2018-10-30T17:04:40Z. The update package is 1.16 GB. This is a delta (partial) update that requires 11.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1aba47d7c1118fd719abae335c88b5d4578a6a91.zip.