iOS 11.0.2 (build 15A421) is an official Apple over-the-air update for the iPhone 6, released on 2017-10-03T17:04:28Z. The update package is 264.76 MB. This is a delta (partial) update that requires 11.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6777e3803d003a1023894293f02a8e31611e48e4.zip.