iOS 9.3 (build 13E5233a) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2016-03-14T21:45:44Z. The update package is 38.45 MB. This is a delta (partial) update that requires 9.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 710ad40af41251d5e2d3761675c3d78d7b3f72d1.zip.