iOS 8.0.1 (build 12A402) is an official Apple over-the-air update for the iPhone 4s, released on 2014-09-24T17:53:04Z. The update package is 958.82 MB. This is a delta (partial) update that requires 7.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f4fc456edbb8e370f1c23e70e093523db3f62778.zip.