iOS 9.0.1 (build 13A404) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2015-09-23T17:55:21Z. The update package is 964.5 MB. This is a delta (partial) update that requires 8.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c2cbc250b53ec21155472d75876779b173f1d951.zip.