iOS 15.7.3 (build 19H307) is an official Apple over-the-air update for the iPhone 6s+, released on 2023-01-23T18:49:15Z. The update package is 3.53 GB. This is a delta (partial) update that requires 12.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 009a304a13f88930b7796e5d7399cf8f9dca683c.zip.