iPadOS 12.1.3 (build 16D5037a) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2019-01-07T18:06:31Z. The update package is 223.83 MB. This is a delta (partial) update that requires 12.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 41b804da58094e89f5ba5b9c66fa3ec749bd0773.zip.