iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2019-01-22T18:06:02Z. The update package is 1.25 GB. This is a delta (partial) update that requires 11.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b2629ed799f303d9755c408092bca27975561acb.zip.