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 969.75 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: 7a8bc3cc836decaad48a1da3b856750f77dd511d.zip.