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 661.17 MB. This is a delta (partial) update that requires 15.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f785c81dcfd00a96a89d2716ec889a20332173bd.zip.