iOS 12.1 (build 16B5077c) is an official Apple over-the-air update for the iPhone 6, released on 2018-10-09T17:05:57Z. The update package is 443.94 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: a2400f974183160d58faf9ad5516e59940950b34.zip.