iOS 11.4.1 (build 15G5077a) is an official Apple over-the-air update for the iPhone 6s+, released on 2018-07-02T17:05:52Z. The update package is 29.66 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: a4a9d4def0c1dcf26267fead567e08a3a84a356e.zip.