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 1.14 GB. This is a delta (partial) update that requires 15.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 00a39a538238d93ff0e366e2f5746cefa46106ec.zip.