iOS 9.9.10.3 (build 14E277) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2017-03-27T16:57:35Z. The update package is 1.19 GB. This is a delta (partial) update that requires 8.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4c53490894cc5bf31617d5ae76fa43134f013dfb.zip.