iOS 9.0.1 (build 13A404) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2015-09-23T17:55:23Z. The update package is 1.33 GB. This is a delta (partial) update that requires null already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ac4407059788189a74e98431ca6517e4e9d03cd3.zip.