iOS 11.3 (build 15E5211a) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2018-03-12T17:05:43Z. The update package is 290.27 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: 27a8ff95061db9999de456ef2e6dc53a340fb045.zip.