iOS 9.3 (build 13E5181f) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2016-01-14T18:01:24Z. The update package is 1.35 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ca6d3ab726863f08849d6eac4c56fdb5393280a5.zip.