iOS 11.4 (build 15F5061e) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2018-05-01T17:06:17Z. The update package is 280.68 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: 660581b51d6e1f5f98fb4a0b6ef2c8728316455c.zip.