iOS 10.3 (build 14E5249d) is an official Apple over-the-air update for the iPhone SE, released on 2017-02-20T17:58:04Z. The update package is 274.04 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: 2145163560f8dff67d4a62ef67cad4ffa213c3a6.zip.