iOS 9.9.11.1 (build 15B93) is an official Apple over-the-air update for the iPhone 6+, released on 2017-10-23T17:06:54Z. The update package is 1.55 GB. This is a delta (partial) update that requires 9.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c6c35727d5e17c6fa14502119689f1b3f6061438.zip.