iOS 9.9.11.4.1 (build 15G77) is an official Apple over-the-air update for the iPhone 6, released on 2018-07-09T17:09:47Z. The update package is 1.48 GB. This is a delta (partial) update that requires 9.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d6f08f10fcc246dc87209bc3cdc77972c76ef3a6.zip.