iOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2018-10-30T17:17:59Z. The update package is 470.9 MB. This is a delta (partial) update that requires 12.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f8903199d7e220b13187710f0537b82cb948a9ec.zip.