iOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPhone 5c (GSM), released on 2015-10-21T17:16:01Z. The update package is 967.29 MB. This is a delta (partial) update that requires 8.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9f1e93166aa9319b06a36f3f05a7878eb87f7104.zip.