iOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPhone 8 (Global), released on 2018-10-30T17:15:35Z. The update package is 1.47 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: 8fa16b5f4f3c482c43948e073b3b56ec5b929e60.zip.