iOS 12.1.2 (build 16C101) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2018-12-17T21:06:06Z. The update package is 1.48 GB. This is a delta (partial) update that requires 11.2.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b983d1aa22592d8c0cfa28fdd42119d437741202.zip.