iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2019-01-22T18:05:53Z. The update package is 1.19 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: 2d43180495eacd6d564672a2ee6c3a1648629471.zip.