iOS 15.7.4 (build 19H321) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2023-03-27T17:13:21Z. The update package is 723.94 MB. This is a delta (partial) update that requires 15.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 599bd8897a35f32a2adccd17be1785b5987e8e8a.zip.