iOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPhone 5 (Global), released on 2015-08-13T18:05:13Z. The update package is 910.29 MB. This is a delta (partial) update that requires 7.1 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: 466481f0ed23ff0a30d35b803243d2b17573e064.zip.