iOS 9.9.10.3 (build 14E277) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-03-27T16:57:51Z. The update package is 1.5 GB. This is a delta (partial) update that requires 7.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fae78d391790eba0de1d409b069f3b6438a43c9e.zip.