iPadOS 15.7.3 (build 19H307) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2023-01-23T18:47:54Z. 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: 546375d9f0628bb4d68bf5b36486f70648c0f09b.zip.