iOS 15.7.4 (build 19H321) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2023-03-27T17:13:15Z. The update package is 2.32 GB. This is a delta (partial) update that requires 14.8.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0e54317884fbc85083d50193151a0998c32b4874.zip.