iOS 11.3 (build 15E5189f) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2018-02-20T18:06:29Z. The update package is 312.45 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: d4e5fde5c2b674cf11a4ba799596358b0b9387c1.zip.