iOS 11.3 (build 15E5189f) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2018-02-20T18:06:23Z. The update package is 346.51 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: 7b5add2032619958d7e6fb66914e161eff2c7ad9.zip.