iOS 9.1 (build 13B5119e) is an official Apple over-the-air update for the iPhone 6+, released on 2015-09-23T17:55:09Z. The update package is 1.55 GB. This is a delta (partial) update that requires null already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 736e19a774800373c3efd094ac2d567ba836324b.zip.