iOS 10.3 (build 14E5249d) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2017-02-20T17:57:46Z. The update package is 158.57 MB. This is a delta (partial) update that requires 10.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3948211d52ae70822afd45fa6a0133f49248d839.zip.