iOS 9.0 (build 13A344) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2015-09-16T18:02:14Z. The update package is 904.7 MB. This is a delta (partial) update that requires 8.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9449ec498905e1ac89c1f0cc4f87ef5fb4056193.zip.