iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2019-01-22T18:06:08Z. The update package is 384.73 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: 9e4822df91ed6fcd61f6be682240ebef3bd9cfa0.zip.