iPadOS 15.7.3 (build 19H307) is an official Apple over-the-air update for the iPad Air 2 (Cellular), released on 2023-01-23T18:48:01Z. The update package is 1.19 GB. This is a delta (partial) update that requires 15.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 82baaf211f5118a5aab2d32ec4e1e5e4c1d99001.zip.