iOS 12.1.2 (build 16C101) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2018-12-17T21:07:48Z. The update package is 1.43 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: d689cb31be2b1a3e1a6db8d8cbfb737f8a8ef27f.zip.