iOS 9.0 (build 13A344) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2015-09-16T18:02:13Z. The update package is 964.91 MB. This is a delta (partial) update that requires 8.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e4742a8ae69be6e26c7e2c740215c26614db5c9c.zip.