iOS 15.7.4 (build 19H321) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2023-03-27T17:13:14Z. The update package is 2.34 GB. This is a delta (partial) update that requires 14.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3891588ad66b193177f0bac46cb12bed6a65d2c4.zip.