iOS 9.9.10.3.1 (build 14E304) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2017-04-03T17:00:25Z. The update package is 903.88 MB. This is a delta (partial) update that requires 9.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 94a047cbe650b4457711375b32426f838eb27291.zip.