iOS 11.4.1 (build 15G5063b) is an official Apple over-the-air update for the iPhone 6, released on 2018-06-11T17:21:58Z. The update package is 219.17 MB. This is a delta (partial) update that requires 11.4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2e3846153a67f3db8191660fe2718ed6819402cc.zip.