iPadOS 15.7.3 (build 19H307) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2023-01-23T18:47:56Z. The update package is 2.91 GB. This is a delta (partial) update that requires 13.7 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ed609e2e5f3ad54129aee16db85cd9f103f68e3c.zip.