iPadOS 13.4 (build 17E5249a) is an official Apple over-the-air update for the iPad Air 3 (Cellular), released on 2020-03-03T18:19:40Z. The update package is 819.64 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: bb34fe80cf7841e04c2a911ec324470725b13ad1.zip.