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 368.43 MB. This is a delta (partial) update that requires 12.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: be243add1a648e1368d6e2dee115db9f40298d32.zip.