iOS 12.1 (build 16B5059d) is an official Apple over-the-air update for the iPhone 6, released on 2018-09-18T17:20:22Z. The update package is 413.11 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: 0fba21dc7ce1bfb56f21bdfc4888607bd614e41d.zip.