iOS 9.9.11.1.1 (build 15B150) is an official Apple over-the-air update for the iPhone 6, released on 2017-11-09T18:10:26Z. The update package is 1.62 GB. This is a delta (partial) update that requires 8.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f3bf67e1d1552d11e4764d896a2ada5aa5ea162d.zip.