iOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2018-10-30T17:17:58Z. The update package is 1.42 GB. This is a delta (partial) update that requires 11.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2375e2c9eee2b89ee6faef839a00da53d8685700.zip.