iOS 9.3.3 (build 13G34) is an official Apple over-the-air update for the iPhone 6, released on 2016-07-18T17:55:29Z. The update package is 1.16 GB. This is a delta (partial) update that requires 8.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bdeec6efabe06fbb6a3ae2d0726dd698cb4b92a0.zip.