iOS 8.4 (build 12H143) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2015-06-30T15:51:19Z. The update package is 171.66 MB. This is a delta (partial) update that requires 8.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 405776f941bf3e7a1ab0230d719ec8dcf01ae53b.zip.