iOS 11.4.1 (build 15G77) is an official Apple over-the-air update for the iPhone 6, released on 2018-07-09T17:09:53Z. The update package is 686.46 MB. This is a delta (partial) update that requires 11.2.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 748e3c3bffec51fd15f3ce474f0e6a68c20d5f03.zip.