iOS 9.9.10.3 (build 14E277) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-03-27T16:57:53Z. The update package is 1.24 GB. This is a delta (partial) update that requires 9.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a9c42d5363c5ca6b998c2be5274bf0465a1e61f3.zip.