iOS 10.3.1 (build 14E304) is an official Apple over-the-air update for the iPhone 7 (Global), released on 2017-04-03T17:00:39Z. The update package is 586.12 MB. This is a delta (partial) update that requires 10.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cc222a5f1648b54758a11ab3f93cb99650fa3053.zip.