Trigger phrase to wake up

Q: Why can't I say 'hey speaking email' like 'hey siri' or 'hey google'?

We don't have a spoken trigger phrase, but there is a microphone button in the bottom left corner which provides in similar function. It enables you to interrupt at any time and activates listening for a command in the current context. 


Trigger phrases like 'Hey Siri' or 'Hey Google' are not actually simple - they don't use the standard voice recognition system but are typically hard coded at a very low system level and often built into hardware, which is what allows them to be listening all the time and wake up. 

Here is an article about the tech behind 'Hey Siri'. 

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