iOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2015-10-21T17:16:00Z. The update package is 964.02 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: c742d65f30bcd26d6a5d016d4eaa2e3825cc6e93.zip.