iPadOS 15.7.3 (build 19H307) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2023-01-23T18:47:55Z. The update package is 1.14 GB. This is a delta (partial) update that requires 15.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1d332498179ba7b17e0ba43d6a091fc1117b5817.zip.