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When voice commands first came out on phones, it was a bit of a joke — they were finicky, hard to control, and would often misunderstand the user and perform the wrong task.
But voice commands have significantly evolved, and become built-in assistants that we now know by name. Siri, the iPhone assistant, now has an expanded list of varied commands that it can help you with.
How to wake Siri
Press and hold the home button: if you have a newer model without a home button, hold the side button down.
“Hey Siri”: the standard wake-up greeting should wake Siri to listen to your commands regardless of where you are, as long as you have an iPhone model 6S or later. If you have the 6 or earlier, your phone has to be plugged in and charging for the command to work.
Neither of these commands will work, however, if you don’t have them enabled in Settings. To do so, tap “Siri & Search,” in the Settings app, and toggle the relevant switch — “Listen for ‘Hey Siri'” or “Press Home/Side Button for Siri” — …read more
Source:: Businessinsider – Technology