iOS 9.0 (build 13A4293g) is an official Apple over-the-air update for the iPhone 4s, released on 2015-07-08T18:38:05Z. The update package is 282.62 MB. This is a delta (partial) update that requires 9.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4db6b55d54d3eebeb84b3048bccd25189b93b8bc.zip.