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 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: 1447b51146ebb7e361506256b300e6156bc2f083.zip.