iOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPhone 6, released on 2015-10-21T17:16:05Z. The update package is 247.21 MB. This is a delta (partial) update that requires 9.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f6f56965c96944a4ff9fd47a0deac41b4530d050.zip.