iOS 11.4 (build 15F5061d) is an official Apple over-the-air update for the iPhone 6+, released on 2018-05-01T17:06:04Z. The update package is 182.53 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: df5acc491d8b75799021d393af4034b9cb7aa761.zip.