iPadOS 13.4 (build 17E5223h) is an official Apple over-the-air update for the iPad Air 3 (Cellular), released on 2020-02-05T18:16:51Z. The update package is 776.9 MB. This is a delta (partial) update that requires 13.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7b9c791377996ab3ab8f755991d21e0c6284125c.zip.