iOS 9.3 (build 13E5200d) is an official Apple over-the-air update for the iPhone 4s, released on 2016-02-08T17:48:19Z. The update package is 69.07 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: 2de4d320d15a54c1feb4e1ad0f05a773ecbed613.zip.