iOS 15.7.4 (build 19H321) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2023-03-27T17:13:30Z. The update package is 727.13 MB. This is a delta (partial) update that requires 15.6.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cde3d80f65568b2f805fdf013dc91f37f17441ee.zip.