iOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPhone 5 (Global), released on 2015-10-21T17:16:01Z. The update package is 964.09 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: 363465a7a4ab2fd12cd733cc22e9fabab4512047.zip.