iOS 9.3.4 (build 13G35) is an official Apple over-the-air update for the iPhone 6s, released on 2016-08-04T17:08:27Z. The update package is 382.8 MB. This is a delta (partial) update that requires 9.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 39b14ce084a899a597bcc505ab77765aa53ab023.zip.