iOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2018-10-30T17:15:45Z. The update package is 1.53 GB. This is a delta (partial) update that requires 11.2.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 81a474519bc54203087b4f385787a49bb9f19213.zip.