iOS 15.7.3 (build 19H307) is an official Apple over-the-air update for the iPhone 7 (Global), released on 2023-01-23T18:49:31Z. The update package is 1.42 GB. This is a delta (partial) update that requires 15.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2265c4a889079bd2d6234a33c6c6e8d4667847d8.zip.