iPhone 6s vs iPhone 6: What’s New

Hey Siri Anytime

With the iPhone 6s users can now use the Hey Siri feature all the time. On the iPhone 6, owners can use Hey Siri, but it only works when the iPhone is connected to Power.

On the iPhone 6s, the Motion Co-Processor is in the A9 processor and it can use the Hey Siri feature at any time without impacting battery life.

This will allow you to say, "Hey Siri" with your phone across the room even if it is not plugged in so you can use the new iOS 9 Siri features.