iOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPhone 8 (Global), released on 2018-03-29T17:11:21Z. The update package is 798.13 MB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6fe316b16028581e8a2efcbded78ab20cc531a37.zip.