iOS 8.0 (build 12A365) is an official Apple over-the-air update for the iPhone 4s, released on 2014-09-17T17:54:04Z. The update package is 920.82 MB. This is a delta (partial) update that requires 7.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bd7c13e47c08cbd47c423e9ddb8be792a1de09d8.zip.