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 910.28 MB. This is a delta (partial) update that requires 7.1.1 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: 8b73de44bef33a805e30a718b86e5f14b2410bce.zip.