iOS 8.4 (build 12H143) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2015-06-30T15:51:18Z. The update package is 406.76 MB. This is a delta (partial) update that requires 8.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4a83141aab3f1404277e7ce824a486841518a4ee.zip.