iOS 12.1.2 (build 16C101) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2018-12-17T21:07:51Z. The update package is 2 GB. This is a delta (partial) update that requires 10.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 94232717266e104ab71801cd2ae05ec2d0eb53d4.zip.