iOS 15.7.4 (build 19H321) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2023-03-27T17:13:11Z. The update package is 3.1 GB. This is a delta (partial) update that requires 13.7 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1b7411a21bba93d3886bb8c09e52110c279e2cd8.zip.