iOS 10.3.1 (build 14E304) is an official Apple over-the-air update for the iPhone 5 (Global), released on 2017-04-03T17:00:27Z. The update package is 385.91 MB. This is a delta (partial) update that requires 10.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a8e55f5d22db1318c2e74df2f8b0a65e74ef3746.zip.