iOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2018-03-29T17:11:24Z. The update package is 750.97 MB. This is a delta (partial) update that requires 11.2.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b73a9f0535ad46df62888a8a70886bc1375326c7.zip.