iOS 15.7.4 (build 19H321) is an official Apple over-the-air update for the iPhone 7 (Global), released on 2023-03-27T17:13:01Z. The update package is 196.12 MB. This is a delta (partial) update that requires 15.7.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5d5140607f0f17a41b98ceeddf5e8a7e2fd0e8f0.zip.