iOS 8.0 (build 12A4331d) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2014-07-21T17:54:05Z. The update package is 253.48 MB. This is a delta (partial) update that requires 8.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1604e4d6c381d10bedd7fd1e722fa40081d0299b.zip.