iOS 8.1 (build 12B407) is an official Apple over-the-air update for the iPhone 6, released on 2014-10-07T18:06:10Z. The update package is 62.54 MB. This is a delta (partial) update that requires 8.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a7c508262bae877ad483cfb2afd7ac9dc8311f1d.zip.