iOS 9.0 (build 13A344) is an official Apple over-the-air update for the iPhone 5c (GSM), released on 2015-09-16T18:02:14Z. The update package is 968.03 MB. This is a delta (partial) update that requires 8.1.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b8e5fdd335848065a6b37c75bbb7ec931e14a003.zip.