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 275.73 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: dcdbc6fe3aacf14a3faa1b98f53ef5e4766e5ff4.zip.