iOS 12.1 (build 16B5077c) is an official Apple over-the-air update for the iPhone 7 (Global), released on 2018-10-09T17:06:02Z. The update package is 550.66 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 80e9c8620378e2d1e8305bd8687ab7e5eaaed2ad.zip.