iOS 15.7.4 (build 19H321) is an official Apple over-the-air update for the iPhone 7 (Global), released on 2023-03-27T17:13:00Z. The update package is 2.36 GB. This is a delta (partial) update that requires 14.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a004902e76f1adfef165136439155b296d595300.zip.