iOS 11.3 (build 15E5211a) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2018-03-12T17:05:40Z. The update package is 290.24 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: 7591b426df803c1a659fe418831f8b374de290cb.zip.