iOS 12.1.2 (build 16C101) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2018-12-17T21:05:56Z. The update package is 1.5 GB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 62c60a1acf79b06c1c1968f41bef87fbfec09b08.zip.