iOS 15.7.4 (build 19H321) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2023-03-27T17:13:18Z. The update package is 1.23 GB. This is a delta (partial) update that requires 15.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9a9770c9559faae19d15a01a85d6a8b88465b119.zip.