iOS 11.4.1 (build 15G77) is an official Apple over-the-air update for the iPhone 6, released on 2018-07-09T17:09:54Z. The update package is 275.83 MB. This is a delta (partial) update that requires 11.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 21de9c1c742f918b4ca56193fe722bcf33a3c0e9.zip.