iOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2018-03-29T17:13:37Z. The update package is 800.35 MB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5c7a67261ff73a5fdc658dc9866e10721fbdda61.zip.