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 197.09 MB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c96e877314a429d5e94a55dba9f049c3707e9eb2.zip.