iOS 12.1.2 (build 16C101) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2018-12-17T21:06:13Z. The update package is 525.5 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 82de0db9d0706f37c90bce38722e56e3d934b094.zip.