iOS 12.1 (build 16B5077c) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2018-10-09T17:05:42Z. The update package is 567.71 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 09f4600b518b0692549a0e7d4971e24ddd97eb7e.zip.