iOS 8.4 (build 12H143) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2015-06-30T15:51:22Z. The update package is 1.02 GB. This is a delta (partial) update that requires 7.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3fea3e835036ad86600356d44e3cd6a2bb79dca2.zip.