iOS 11.3 (build 15E5178f) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2018-02-06T18:21:24Z. The update package is 378.45 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: a82182899d6ef3c94d44c0bd6a73ff1150878e7c.zip.