iOS 9.9.11.0 (build 15A372) is an official Apple over-the-air update for the iPhone 6, released on 2017-09-12T19:10:09Z. The update package is 1.51 GB. This is a delta (partial) update that requires 8.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4cf2906c81e8f3739f9b9fe4f4897eeef283d63a.zip.