iOS 15.7.4 (build 19H321) is an official Apple over-the-air update for the iPhone 7 Plus (Global), released on 2023-03-27T17:13:03Z. The update package is 2.39 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: e8de5cb99300cdd255072dc5c7738fb00b0fe1cc.zip.