iOS 9.3.3 (build 13G34) is an official Apple over-the-air update for the iPhone 6, released on 2016-07-18T17:55:31Z. The update package is 91.25 MB. This is a delta (partial) update that requires 9.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8bb8bc5b0c6f73eb6c982981af20b59ca9985d69.zip.