iOS 15.7.4 (build 19H321) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2023-03-27T17:13:25Z. The update package is 2.43 GB. This is a delta (partial) update that requires 14.4.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a8b9b85cb7a8aac3f78dd25f8bd5eb3eef51981d.zip.