iOS 10.3 (build 14E5277a) is an official Apple over-the-air update for the iPhone SE, released on 2017-03-16T16:56:41Z. The update package is 410.39 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: 53e7d41cfe3603e5962e05c23c42235263f20d04.zip.