iOS 12.1.2 (build 16C101) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2018-12-17T21:06:05Z. The update package is 1.5 GB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b09afd207ce937efde0a08be8224d352eec2175f.zip.