iOS 11.3 (build 15E5178f) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2018-02-06T18:21:23Z. The update package is 378.42 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: 6d267fdf20e0322a283285e63c6299bbf2dbcd99.zip.