iOS 11.3 (build 15E5178f) is an official Apple over-the-air update for the iPhone 7 Plus (Global), released on 2018-02-06T18:21:27Z. The update package is 368.29 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: 64535c58ea84586b49473cc042946369842874e8.zip.