iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2019-01-22T18:05:55Z. The update package is 308.81 MB. This is a delta (partial) update that requires 12.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 32ceb574873f64a264e153f982a4f30fcb6ba9af.zip.